feat(semconv): donation-ready NuGet packages + runtime cutover

[ANcpLua]

Summary

Ships three donation-ready NuGet packages for OTel semconv consumption and cuts the qyl runtime over to them end-to-end.

• Qyl.SemanticConventions — core types
• Qyl.OpenTelemetry.SemanticConventions — OTel stable attributes
• Qyl.OpenTelemetry.SemanticConventions.Incubating — OTel experimental attributes
• NUKE GenerateSemconv target — deterministic Weaver pipeline driven by embedded schemas
• Runtime cutover — every call site switched to generated typed constants (no magic strings left)
• Merge gate — Phase 7 commit wires the gate; OSX platform fix included

250 files, +11,805 / −1,194 LOC.

Scope

Target achieved: 100% — packages produce deterministically via nuke GenerateSemconv, runtime compiles and runs on the typed constants, cutover verified by the orphan-scan CLI (shipped in PR #2) reporting 0 orphans.

Missing to 100%: nothing blocking donation. Final semconv-1.40 refresh will happen naturally on the next upstream semconv release via Weaver regeneration.

Risk

5% — high confidence goal is met.

• Runtime is fully cut over; collector + loom + mcp + dashboard all resolve against the new typed constants.
• Any remaining magic strings are caught by the analyzer package in PR refactor: internal OTLP types + remove ghost code #2.
• Residual risk is a surprise consumer outside the orphan-scan path (none known).

What's left to do or delete to reach 100%

• Nothing on this branch. The companion PRs complete the story:
  • PR refactor: internal OTLP types + remove ghost code #2 (analyzers) — policy enforcement for deprecated names and magic strings
  • PR fix: resolve NU1506 duplicate package errors and update SDK to 1.6.29 #3 (workflow) — publish the 4 packages via OIDC trusted publishing

Test plan

• Backend CI green (Schema-Drift job remains red by known pre-existing issue documented in CLAUDE.md)
• nuke GenerateSemconv idempotent on a fresh clone
• dotnet build qyl.slnx -c Release succeeds

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📝 Walkthrough

Walkthrough

Removed five diagnostics from the qyl-semconv-lint emitter, leaving only upstream-collision. Deleted the TypeSpec telemetry attribute registry (core/specs/telemetry/qyl-attrs.tsp) and removed its import sites. Replaced multiple rule checks with a single upstream-collision rule and removed corresponding tests. Added numerous OpenTelemetry semantic-conventions YAML files under eng/semconv/qyl/model/ and new Weaver/C# generation templates under eng/semconv/templates/registry/. Updated the build pipeline to init the semconv submodule and run Weaver to generate stable, incubating, and qyl packages.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	Title follows conventional commits format with 'feat' prefix and '(semconv)' scope, is under 72 characters, contains no trailing period, and accurately describes the core changes: shipping NuGet packages and performing runtime cutover to typed constants.
Description check	✅ Passed	Description clearly relates to the changeset, detailing the three packages shipped, runtime cutover scope, risk assessment, test plan, and outstanding work in companion PRs.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[Copilot]

Pull request overview

This PR introduces three new, donation-ready semantic-conventions NuGet packages (qyl-owned + OTel stable + OTel incubating), updates the NUKE GenerateSemconv pipeline to deterministically regenerate them via Weaver, and cuts runtime code over to the new generated typed constants (replacing the prior qyl.contracts.Attributes facades).

Changes:

• Add new packages: Qyl.SemanticConventions, Qyl.OpenTelemetry.SemanticConventions, and Qyl.OpenTelemetry.SemanticConventions.Incubating (generated constants + embedded schemas).
• Update runtime/services to reference the new packages and migrate attribute-key usage to generated constants.
• Update nuke GenerateSemconv to run Weaver directly for C# outputs (plus submodule bootstrap and schema copying).

Reviewed changes

Copilot reviewed 165 out of 245 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
services/qyl.mcp/qyl.mcp.csproj	Adds project refs to the new semconv packages.
services/qyl.mcp/Hosting/QylMcpServerRegistration.cs	Switches MCP tracing tags to generated semconv constants; tool type value now literal.
services/qyl.mcp/Client.cs	Switches schema URL source to SchemaUrl.Current from the new package.
services/qyl.dashboard/package-lock.json	Lockfile normalization (removes libc constraints entries).
services/qyl.collector/qyl.collector.csproj	Adds project refs to the new semconv packages.
services/qyl.collector/Telemetry/QylTelemetry.cs	Migrates metric name to QylAttributes.* constant.
services/qyl.collector/Telemetry/QylLogEnricher.cs	Migrates log enrichment key to QylAttributes.* constant.
services/qyl.collector/Storage/DuckDbStore.cs	Migrates counter names to QylAttributes.* constants.
services/qyl.collector/Ingestion/CodexTelemetryMapper.cs	Migrates to generated OTel constants for provider/op/error/exception; tool type value now literal.
services/qyl.collector/GlobalUsings.cs	Replaces qyl.contracts.Attributes with global usings for new generated attributes.
services/qyl.collector/Auth/TokenAuth.cs	Replaces Keycloak claims key literal with QylAttributes.KeycloakClaims.
qyl.slnx	Adds the three new packages to the solution.
packages/Qyl.SemanticConventions/**	New package: qyl-owned attribute keys + schema + generated version constant.
packages/Qyl.OpenTelemetry.SemanticConventions/**	New package: OTel stable attribute keys + schema + generated schema URL/version.
packages/Qyl.OpenTelemetry.SemanticConventions.Incubating/**	New package: OTel incubating attribute keys + schema + generated schema URL/version.
packages/Qyl.Contracts/Attributes/McpAttributes.cs	Removes old hand-maintained MCP semconv facade.
packages/Qyl.Contracts/Attributes/DbAttributes.cs	Removes old hand-maintained DB semconv facade.
internal/qyl.instrumentation/qyl.instrumentation.csproj	Adds project refs to the new semconv packages.
internal/qyl.instrumentation/Instrumentation/GenAiConstants.cs	Switches to incubating generated GenAI constants for provider/op/output type.
internal/qyl.instrumentation/Instrumentation/GenAi/GenAiInstrumentation.cs	Migrates tags to generated constants; metric instrument names now literals.
internal/qyl.instrumentation/Instrumentation/Db/SqlOperationParser.cs	Removes dependency on removed DB facade; uses literal SQL operation strings.
internal/qyl.instrumentation/Instrumentation/Db/DbInstrumentation.cs	Switches to generated DB constants; preserves some legacy db.system values via literals.
internal/qyl.instrumentation/Instrumentation/ActivityExceptionTelemetry.cs	Switches error/exception keys to generated constants (keeps exception.escaped as literal).
eng/semconv/templates/registry/**	Adds Weaver template sets for stable/incubating/qyl C# registries.
eng/semconv/qyl/model/*.yaml	Adds qyl-owned semconv registry YAML files (auth, issue, run, etc.).
eng/build/BuildPipeline.cs	Updates GenerateSemconv to generate the C# packages via Weaver and copy schemas.
core/specs/telemetry/qyl-attrs.tsp	Removes the prior TypeSpec-based qyl telemetry attribute registry marker.
core/specs/qyl-emit-config.tsp	Drops import of the qyl-semconv-lint package.
core/specs/main.tsp	Removes import of the removed telemetry registry marker.
core/specs/emitters/qyl-semconv-lint/src/index.ts	Reduces diagnostics surface (keeps only upstream-collision).
core/specs/emitters/qyl-semconv-lint/test/rules.test.ts	Reduces test coverage to only upstream collision.
core/specs/**/package-lock.json	Lockfile normalization (removes libc constraints entries).

Files not reviewed (3)

• core/specs/emitters/qyl-semconv-lint/package-lock.json: Language not supported
• core/specs/package-lock.json: Language not supported
• services/qyl.dashboard/package-lock.json: Language not supported

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[Copilot]

Hard-coded tool type value "extension" is now used directly. Since there are multiple call sites using well-known gen_ai.tool.type values and the generated semconv code doesn’t provide value constants for them, consider introducing a shared constant (or small helper) to keep these values consistent across the runtime.

[Copilot]

Hard-coded tool type value "function" is now written into span attributes. With multiple call sites emitting gen_ai.tool.type and no generated value constants, consider centralizing these well-known values to avoid inconsistent spelling/casing over time.

[Copilot]

This PR removes diagnostics/rules beyond upstream-collision, which means @qylAttr keys like acme.foo or qyl.Foo will no longer be rejected by this linter (only reserved-prefix collisions are caught). If this is intentional, consider updating the library’s docs/comments (and/or its name/README) to reflect the reduced validation scope so consumers don’t assume QYL-LINT-002..006 are still enforced.

[Copilot]

Schema URL in this README (https://schemas.qyl.io/1.0.0) does not match the embedded schema manifest (schemas/1.0.0.yaml declares https://qyl.dev/schemas/1.0.0). This will confuse consumers and makes it unclear which URL is authoritative. Align the README to the YAML (or update the YAML) so the package documentation and embedded schema agree.

[Copilot]

The schema copy step is silently skipped when the source schema file isn't found. That can lead to generating/packing OTel semconv packages without the embedded schema resource, breaking the “deterministic pipeline” goal while still succeeding locally/CI. Consider failing the target if the schema file is missing (and/or logging an explicit warning with the expected path), and remove the redundant Length > 0 check.

Suggested change

	if (((string)schemaSource).Length > 0 && File.Exists(schemaSource))
	{
	ReadOnlySpan<string> otelPackages = ["Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating"];
	foreach (var pkg in otelPackages)
	{
	var schemasDir = RootDirectory / "packages" / pkg / "schemas";
	Directory.CreateDirectory(schemasDir);
	File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
	}
	}
	if (!File.Exists(schemaSource))
	{
	Log.Error("GenerateSemconv: required OTel schema file was not found at {SchemaSource}", schemaSource);
	throw new FileNotFoundException($"Required OTel schema file was not found: {schemaSource}", schemaSource);
	}
	ReadOnlySpan<string> otelPackages = ["Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating"];
	foreach (var pkg in otelPackages)
	{
	var schemasDir = RootDirectory / "packages" / pkg / "schemas";
	Directory.CreateDirectory(schemasDir);
	File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
	}

[Copilot]

These histogram instrument names were previously sourced from a typed constant, but are now hard-coded string literals. This is a regression against the PR goal of eliminating magic strings and increases the chance of subtle naming drift/typos. Consider reintroducing a single authoritative constant location for these metric names (e.g., an internal GenAiMetricNames class) and reference that from here.

[Copilot]

toolType defaults to a free-form string literal ("function") and the same tool type values are also hard-coded elsewhere (e.g., "extension" in MCP and "function" in Codex mapping). Since the new generated semconv package doesn't provide value constants for gen_ai.tool.type, consider centralizing these well-known values in one place to avoid drift/typos across call sites.

[coderabbitai]

Actionable comments posted: 11

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@core/specs/emitters/qyl-semconv-lint/src/rules.ts`:
- Around line 20-28: The docblock says keys must be qyl-owned but the current
checkUpstreamCollision(program, records) logic no longer enforces a "qyl."
prefix and only checks RESERVED_PREFIXES; restore an explicit diagnostic that
requires every `@qylAttr` key string (from QylAttrRecord) to start with "qyl." and
emit a clear error when it does not, while keeping the existing
upstream-collision checks; update the checkUpstreamCollision function (and the
same logic that handles records around lines ~41-45) to first validate the
"qyl." prefix on the attribute name, then proceed to the RESERVED_PREFIXES
collision check so the rule enforces both ownership and upstream avoidance.

In `@eng/build/BuildPipeline.cs`:
- Line 91: The foreach currently allocates a new array in the loop header
(foreach (var pkg in new[] { "Qyl.OpenTelemetry.SemanticConventions",
"Qyl.OpenTelemetry.SemanticConventions.Incubating" })) which triggers CA1861;
fix it by replacing the inline array with a reuseable source such as a private
static readonly string[] field (e.g., private static readonly string[]
SemanticConventionPkgs = { "Qyl.OpenTelemetry.SemanticConventions",
"Qyl.OpenTelemetry.SemanticConventions.Incubating" }) and iterate over
SemanticConventionPkgs in the foreach, or alternatively call the operation
explicitly twice for each package name to avoid any array allocation; reference
the foreach block and the package names when applying the change.
- Around line 88-97: The current embedding block around schemaSource in
BuildPipeline.cs silently skips embedding when the upstream schema file is
missing; change it to fail fast by validating that schemaSource exists and
throwing a clear exception (e.g., FileNotFoundException or
InvalidOperationException) with the schemaSource path when
File.Exists(schemaSource) is false before attempting the foreach/Copy loop;
locate the schemaSource initialization and the conditional that currently checks
((string)schemaSource).Length > 0 && File.Exists(schemaSource) and replace the
silent no-op with an explicit throw so packages cannot be produced without the
embedded schema.
- Around line 59-63: The platform selection for the weaver binary in
BuildPipeline.cs incorrectly defaults all non-macOS to
"x86_64-unknown-linux-gnu"; update the logic around weaverArch/weaverBin to
validate OS and Architecture explicitly (using RuntimeInformation.IsOSPlatform
and RuntimeInformation.ProcessArchitecture) and throw a NotSupportedException
for unsupported OS/architecture combinations (e.g., Windows or Linux Arm64) to
mirror bootstrap-weaver.sh behavior so the BuildPipeline fails fast with a clear
error instead of selecting the wrong binary.

In `@eng/semconv/qyl/model/api_key.yaml`:
- Around line 10-13: The audit fingerprint for API keys in
eng/semconv/qyl/model/api_key.yaml is too short (sha256[:8]); update the spec
text and example to use a longer, collision-resistant fingerprint (at minimum
sha256[:16] for 64 bits, preferably sha256[:32] for 128 bits) or switch to a
stable server-side key id; specifically change the brief from "First 8
characters of the API key hash (sha256[:8])" to indicate the chosen longer slice
(e.g., "First 16 characters of the API key hash (sha256[:16])" or "First 32
characters (sha256[:32])") and update the examples array (e.g., from 'a1b2c3d4'
to a matching-length hex sample) and any consumers that parse or generate this
fingerprint (look for references to the api_key fingerprint field/name in
validation/parsing code).

In `@eng/semconv/qyl/model/auth.yaml`:
- Around line 7-12: Replace the experimental attribute id "qyl.keycloak.claims"
(serialized Keycloak JWT claims) with a small allow-list of non-sensitive
derived attributes: add attributes such as "qyl.keycloak.issuer" (string),
"qyl.keycloak.tenant" (string or optional), and "qyl.keycloak.subject_hash"
(string, stable hash of subject) and ensure the raw/serialized claims attribute
is removed; update any gating notes to state these derived attributes may be
emitted only when allowed and do not contain raw PII or secrets, and update any
documentation/comments referencing keycloak.claims to use the new derived
attributes (look for id "keycloak.claims" in the diff to locate the change).

In `@eng/semconv/qyl/model/capability.yaml`:
- Around line 21-23: The member with id 'follow_up' is missing the stability
tag; add "stability: experimental" to the 'follow_up' mapping (same level as
id/value/brief) so it matches the 'starting' member; ensure YAML indentation
aligns with the other members (i.e., add stability: experimental under the
follow_up entry alongside id/value/brief).

In `@eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2`:
- Around line 37-41: The member-level Obsolete emission currently stringifies
member.deprecated; change it to mirror the attribute-level deprecation logic:
inspect member.deprecated for keys (renamed, obsoleted, note) and build a
structured message (e.g., "Renamed to <newName>" when renamed, "Obsoleted:
<reason>" when obsoleted, fallback to note) then pass that message into the
[global::System.Obsolete(..., false)] call for the constant whose identifier is
member.id and value is member.value so member-level deprecation messages match
attribute-level formatting.

In `@eng/semconv/templates/registry/csharp_qyl/weaver.yaml`:
- Around line 9-11: Remove the hardcoded params.schema_version from the template
and instead read the canonical schema version from a single build-owned source
(e.g., a NUKE variable or MSBuild property passed into generation as a
parameter), update generation to inject that value where schema_version was
used, and add a generation-time check that compares the model checksum (or
timestamps) against SchemaVersion.Current and fails the build if the model
changed without bumping that property so generation cannot silently use an
out-of-date SchemaVersion.Current.

In `@eng/semconv/templates/registry/csharp_stable/attributes.cs.j2`:
- Around line 1-50: The template duplicates nearly all Jinja logic; refactor by
extracting the shared rendering into a reusable macro file (e.g., create a
macros jinja file and import it) so the three templates (stable/incubating/qyl)
only differ by the stability filter. Move the XML-escaping/summary generation,
deprecation handling (the Obsolete branches), member loop that generates "{{
local_name }}Values" and member constants, and the local_name/_stripped logic
into a macro (accepting the attribute list or a stability argument), then have
attributes.cs.j2 call that macro with stable_attrs (or the appropriate filtered
list) instead of duplicating the block that generates public const string {{
local_name }} and the nested {{ local_name }}Values class.
- Around line 40-42: The template emits inconsistent Obsolete messages by
stringifying member.deprecated in attributes.cs.j2; update the conditional that
generates the [global::System.Obsolete(...)] for enum members to use the same
structured reason-based logic used earlier for attributes (the logic around
lines 23-30) instead of directly stringifying member.deprecated—i.e., detect
whether a deprecation reason exists and emit either Obsolete("reason", false) or
Obsolete(false) accordingly so enum member deprecation messages match attribute
deprecation messages.

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📥 Commits

Reviewing files that changed from the base of the PR and between ea49455 and abdbe4c.

⛔ Files ignored due to path filters (217)

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📒 Files selected for processing (28)

• core/specs/emitters/qyl-semconv-lint/src/index.ts
• core/specs/emitters/qyl-semconv-lint/src/rules.ts
• core/specs/emitters/qyl-semconv-lint/test/rules.test.ts
• core/specs/main.tsp
• core/specs/qyl-emit-config.tsp
• core/specs/telemetry/qyl-attrs.tsp
• eng/build/BuildPipeline.cs
• eng/semconv/qyl/model/api_key.yaml
• eng/semconv/qyl/model/auth.yaml
• eng/semconv/qyl/model/capability.yaml
• eng/semconv/qyl/model/fix_run.yaml
• eng/semconv/qyl/model/issue.yaml
• eng/semconv/qyl/model/project.yaml
• eng/semconv/qyl/model/run.yaml
• eng/semconv/qyl/model/storage.yaml
• eng/semconv/qyl/model/team.yaml
• eng/semconv/qyl/model/triage.yaml
• eng/semconv/templates/registry/csharp_incubating/attributes.cs.j2
• eng/semconv/templates/registry/csharp_incubating/schema_url.cs.j2
• eng/semconv/templates/registry/csharp_incubating/schema_version.cs.j2
• eng/semconv/templates/registry/csharp_incubating/weaver.yaml
• eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2
• eng/semconv/templates/registry/csharp_qyl/schema_version.cs.j2
• eng/semconv/templates/registry/csharp_qyl/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/attributes.cs.j2
• eng/semconv/templates/registry/csharp_stable/schema_url.cs.j2
• eng/semconv/templates/registry/csharp_stable/schema_version.cs.j2
• eng/semconv/templates/registry/csharp_stable/weaver.yaml

💤 Files with no reviewable changes (4)

• core/specs/main.tsp
• core/specs/emitters/qyl-semconv-lint/src/index.ts
• core/specs/qyl-emit-config.tsp
• core/specs/telemetry/qyl-attrs.tsp

📜 Review details

⏰ Context from checks skipped due to timeout of 120000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)

• GitHub Check: Agent
• GitHub Check: Analyze (csharp)

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📓 Path-based instructions (2)

eng/**

⚙️ CodeRabbit configuration file

Build and deployment infrastructure. Review for: correct MSBuild property usage, Nuke build target dependencies, Docker multi-stage build efficiency, and CI/CD pipeline correctness. Flag hardcoded paths, secrets, or platform-specific assumptions.

Files:

• eng/semconv/templates/registry/csharp_qyl/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/schema_version.cs.j2
• eng/semconv/templates/registry/csharp_qyl/schema_version.cs.j2
• eng/semconv/templates/registry/csharp_incubating/schema_version.cs.j2
• eng/semconv/qyl/model/project.yaml
• eng/semconv/qyl/model/team.yaml
• eng/semconv/templates/registry/csharp_incubating/schema_url.cs.j2
• eng/build/BuildPipeline.cs
• eng/semconv/qyl/model/auth.yaml
• eng/semconv/qyl/model/triage.yaml
• eng/semconv/templates/registry/csharp_stable/schema_url.cs.j2
• eng/semconv/templates/registry/csharp_incubating/weaver.yaml
• eng/semconv/qyl/model/issue.yaml
• eng/semconv/qyl/model/capability.yaml
• eng/semconv/qyl/model/storage.yaml
• eng/semconv/templates/registry/csharp_stable/weaver.yaml
• eng/semconv/qyl/model/fix_run.yaml
• eng/semconv/qyl/model/api_key.yaml
• eng/semconv/qyl/model/run.yaml
• eng/semconv/templates/registry/csharp_stable/attributes.cs.j2
• eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2
• eng/semconv/templates/registry/csharp_incubating/attributes.cs.j2

**/*.cs

📄 CodeRabbit inference engine (AGENTS.md)

**/*.cs: For arbitrary non-chat methods/metrics, use attribute-based instrumentation ([Traced]/[Meter]/[Counter]/etc.) only where no builder surface exists.
New .cs files must be UTF-8 with BOM encoding. .editorconfig declares charset = utf-8-bom under [*.cs].
Use // Copyright (c) 2025-2026 ancplua copyright header on top of .cs files.
XML documentation is required on all public methods and classes in C# files.
Use the Async suffix for any method returning Task / ValueTask, including test methods.
Declare private classes as sealed unless intentionally subclassed.
Environment variables use UPPER_SNAKE_CASE (e.g., QYL_AGENT_MAX_DEPTH, OTEL_EXPORTER_OTLP_ENDPOINT).
C# 14 with preview features enabled. Use file-scoped namespaces, primary constructors, required init properties, pattern matching, switch expressions over if-else.
No suppression: No #pragma warning disable, no [SuppressMessage], no <NoWarn> (exception: upstream sample repos demonstrating experimental APIs).
Never use runtime reflection as a control mechanism, dynamic / ExpandoObject, blocking async (.Result / .Wait()), or any analyzer besides ANcpLua.Analyzers.
Do not suppress null ! when the code can be rewritten to avoid the suppression.
Never hand-register a tool. Instead, add [QylSkill] + [QylCapability] attributes and let the generator handle DI registration, MCP tool registration, and capability catalogs.
No attribute-based agent tracing—[AgentTraced] was removed in the 2026-04 collapse. Use fluent middleware instead.
InvestigationLineage (AsyncLocal) enforces max depth (3), root spawn budget (10), cycle detection. Tools call InvestigationLineage.TryEnter() before starting investigations.
Environment overrides for bounded autonomy: QYL_AGENT_MAX_DEPTH, QYL_AGENT_MAX_SPAWNS.
Construct LoomToolEnvelope results via the non-generic companion — LoomToolEnvelope.Ok(data) / LoomToolEnvelope.Fail<T>(error). NEVER `LoomToolEnvelope....

Files:

• eng/build/BuildPipeline.cs

🧠 Learnings (12)

📓 Common learnings

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.{csproj,package.json} : Do not replace external dependencies: `Microsoft.Agents.AI`, `Microsoft.Agents.AI.Hosting`, `Microsoft.Extensions.AI`, `ModelContextProtocol` 1.1.0, `OpenTelemetry` SDK 1.15.0 + Semantic Conventions 1.40, `DuckDB.NET` 1.5.0, `Base UI` 1.3.0 + `lucide-react`, `xUnit v3` + `Microsoft.Testing.Platform`.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Chat,Agent,Client,Instrumentation,Telemetry}*.cs : Emit OTel GenAI semconv 1.40 with required attributes: `gen_ai.system`, `gen_ai.request.model`, `gen_ai.response.model`, `gen_ai.usage.input_tokens`, `gen_ai.usage.output_tokens`, `gen_ai.operation.name`, `gen_ai.tool.call.id`, `gen_ai.tool.name`, `gen_ai.agent.name`, `gen_ai.agent.id`.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/generators/**/*.cs : Use `IIncrementalGenerator` only. Enforce `ForAttributeWithMetadataName`, value-equatable models, raw strings over `SyntaxFactory`. Never store `ISymbol` in models.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Builder,Composition,Startup,Program}.cs : Replace attribute-based agent telemetry (`[AgentTraced]` + generators) with MAF's fluent middleware pipeline: `.AsBuilder().UseOpenTelemetry("qyl.agent").Build()` at the composition root.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: src/qyl.mcp/CLAUDE.md:0-0
Timestamp: 2026-04-21T00:49:29.212Z
Learning: Applies to src/qyl.mcp/**/*.cs : Use `System.Text.Json` instead of Newtonsoft for JSON serialization in C# code

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Chat,Agent,Client,Instrumentation,Telemetry}*.cs : Emit OTel GenAI semconv 1.40 with required attributes: `gen_ai.system`, `gen_ai.request.model`, `gen_ai.response.model`, `gen_ai.usage.input_tokens`, `gen_ai.usage.output_tokens`, `gen_ai.operation.name`, `gen_ai.tool.call.id`, `gen_ai.tool.name`, `gen_ai.agent.name`, `gen_ai.agent.id`.

Applied to files:

• eng/semconv/templates/registry/csharp_qyl/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/schema_version.cs.j2
• eng/semconv/templates/registry/csharp_qyl/schema_version.cs.j2
• eng/semconv/templates/registry/csharp_incubating/schema_version.cs.j2
• eng/build/BuildPipeline.cs
• eng/semconv/templates/registry/csharp_stable/schema_url.cs.j2
• eng/semconv/templates/registry/csharp_incubating/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/attributes.cs.j2
• eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2
• eng/semconv/templates/registry/csharp_incubating/attributes.cs.j2

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.{csproj,package.json} : Do not replace external dependencies: `Microsoft.Agents.AI`, `Microsoft.Agents.AI.Hosting`, `Microsoft.Extensions.AI`, `ModelContextProtocol` 1.1.0, `OpenTelemetry` SDK 1.15.0 + Semantic Conventions 1.40, `DuckDB.NET` 1.5.0, `Base UI` 1.3.0 + `lucide-react`, `xUnit v3` + `Microsoft.Testing.Platform`.

Applied to files:

• eng/build/BuildPipeline.cs
• core/specs/emitters/qyl-semconv-lint/test/rules.test.ts
• eng/semconv/templates/registry/csharp_stable/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/attributes.cs.j2

📚 Learning: 2026-04-21T00:49:29.212Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: src/qyl.mcp/CLAUDE.md:0-0
Timestamp: 2026-04-21T00:49:29.212Z
Learning: Applies to src/qyl.mcp/src/qyl.mcp.generators/**/*.cs : `src/qyl.mcp.generators/` must emit `QylToolManifest` with `ToolTypes[]`, `ToolDescriptors[]`, and `CreateTools()`

Applied to files:

• eng/build/BuildPipeline.cs
• eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/generators/**/*.cs : Use `IIncrementalGenerator` only. Enforce `ForAttributeWithMetadataName`, value-equatable models, raw strings over `SyntaxFactory`. Never store `ISymbol` in models.

Applied to files:

• eng/build/BuildPipeline.cs
• eng/semconv/templates/registry/csharp_stable/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/attributes.cs.j2
• eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2
• eng/semconv/templates/registry/csharp_incubating/attributes.cs.j2

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Use `nuke Generate` to regenerate TypeSpec + Roslyn outputs. It is idempotent—run it any time. It regenerates `.g.cs`, `openapi.yaml`, and DuckDB DDL.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.978Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.978Z
Learning: Dependency direction is one-way: `qyl.contracts` at the bottom (BCL-only), generators in their own projects (no runtime deps), runtime projects depend on contracts + generator outputs.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/tests/**{Generator,Generator.Tests}/**/*.cs : Test generators via `ANcpLua.Roslyn.Utilities` test infrastructure.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.{g.cs,g.tsp,g.sql,g.ts,g.yaml} : Never hand-edit `*.g.cs`, `*.g.tsp`, `*.g.sql`, `*.g.ts`, or `core/openapi/openapi.yaml`. Fix the generator input (TypeSpec model, attribute, routing table) instead.

Applied to files:

• eng/semconv/templates/registry/csharp_incubating/weaver.yaml
• eng/semconv/templates/registry/csharp_stable/weaver.yaml

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/qyl.mcp/Capabilities/Definitions/**/*.cs : `[QylCapabilityDefinition("id", QylSkillKind.X)]` on marker classes in `Capabilities/Definitions/` defines capability metadata.

Applied to files:

• eng/semconv/qyl/model/capability.yaml

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/qyl.mcp/**/Tools/**/*.cs : `[QylCapability("id", Starting|FollowUp)]` on tool methods links tools to capabilities at compile time.

Applied to files:

• eng/semconv/qyl/model/capability.yaml

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.cs : Never hand-register a tool. Instead, add `[QylSkill]` + `[QylCapability]` attributes and let the generator handle DI registration, MCP tool registration, and capability catalogs.

Applied to files:

• eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2

🪛 GitHub Actions: CI

eng/build/BuildPipeline.cs

[error] 91-91: CA1861: Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🪛 GitHub Check: Backend (.NET)

eng/build/BuildPipeline.cs

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

---

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🪛 GitHub Check: Schema Drift (TypeSpec → Generated)

eng/build/BuildPipeline.cs

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

---

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🔇 Additional comments (5)

eng/semconv/qyl/model/storage.yaml (1)

1-23: LGTM.

Schema structure is valid, naming follows OTel conventions, and the attributes are confirmed in use by DuckDbStore.cs.

eng/semconv/templates/registry/csharp_stable/weaver.yaml (1)

1-51: LGTM.

Schema version 1.40.0 aligns with target OTel Semantic Conventions. Template configuration is correct. The commit hash hardcoding is acceptable given the stated refresh deferral.

eng/semconv/qyl/model/issue.yaml (1)

1-47: LGTM.

Schema structure valid with consistent stability markers across all enum members.

eng/semconv/qyl/model/fix_run.yaml (1)

1-47: LGTM.

Schema valid. Stability markers consistent.

eng/semconv/templates/registry/csharp_incubating/attributes.cs.j2 (1)

40-42: 🛠️ Refactor suggestion | 🟠 Major

Same member deprecation inconsistency.

Apply the structured reason-based handling to match attribute-level deprecation logic. See prior comment on stable template.

⛔ Skipped due to learnings

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/generators/**/*.cs : Use `IIncrementalGenerator` only. Enforce `ForAttributeWithMetadataName`, value-equatable models, raw strings over `SyntaxFactory`. Never store `ISymbol` in models.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.cs : C# 14 with preview features enabled. Use file-scoped namespaces, primary constructors, required init properties, pattern matching, switch expressions over if-else.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Builder,Composition,Startup,Program}.cs : Resource attributes are required on every service with `AddService(serviceName, serviceVersion)` and `[service.instance.id]`, `[deployment.environment]` attributes.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.cs : No suppression: No `#pragma warning disable`, no `[SuppressMessage]`, no `<NoWarn>` (exception: upstream sample repos demonstrating experimental APIs).

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Chat,Agent,Client,Instrumentation,Telemetry}*.cs : Emit OTel GenAI semconv 1.40 with required attributes: `gen_ai.system`, `gen_ai.request.model`, `gen_ai.response.model`, `gen_ai.usage.input_tokens`, `gen_ai.usage.output_tokens`, `gen_ai.operation.name`, `gen_ai.tool.call.id`, `gen_ai.tool.name`, `gen_ai.agent.name`, `gen_ai.agent.id`.

[coderabbitai]

⚠️ Potential issue | 🟠 Major

This no longer enforces the qyl. namespace.

After this change, @qylAttr("foo.bar", ...) passes as long as foo. is not in RESERVED_PREFIXES. That silently widens the contract from “qyl-owned registry keys only” to “any non-upstream namespace,” which contradicts the docblock here and the YAML registry ownership model. Restore the explicit qyl. prefix diagnostic instead of relying solely on upstream-collision.

Also applies to: 41-45

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@core/specs/emitters/qyl-semconv-lint/src/rules.ts` around lines 20 - 28, The
docblock says keys must be qyl-owned but the current
checkUpstreamCollision(program, records) logic no longer enforces a "qyl."
prefix and only checks RESERVED_PREFIXES; restore an explicit diagnostic that
requires every `@qylAttr` key string (from QylAttrRecord) to start with "qyl." and
emit a clear error when it does not, while keeping the existing
upstream-collision checks; update the checkUpstreamCollision function (and the
same logic that handles records around lines ~41-45) to first validate the
"qyl." prefix on the attribute name, then proceed to the RESERVED_PREFIXES
collision check so the rule enforces both ownership and upstream avoidance.

[coderabbitai]

⚠️ Potential issue | 🟠 Major

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
# Verify platform matrix consistency between BuildPipeline and bootstrap script.
rg -n 'weaverArch|IsOSPlatform|ProcessArchitecture|x86_64-unknown-linux-gnu|apple-darwin' eng/build/BuildPipeline.cs -C3
rg -n 'case .*Darwin|Linux|Unsupported platform|WEAVER_ARCH' eng/semconv/bootstrap-weaver.sh -C3

Repository: Alexander-Nachtmann/qyl

Length of output: 1850

---

Fix platform validation in weaver binary selection to match bootstrap script and fail fast on unsupported combinations.

The C# code (lines 59–63) silently defaults all non-macOS platforms to x86_64-unknown-linux-gnu, but bootstrap-weaver.sh (lines 44–50) explicitly rejects unsupported platform–architecture pairs. On Windows or Linux Arm64, the C# code selects the wrong weaver binary and fails with non-diagnostic errors downstream.

Bring the C# code into alignment with the shell script by explicitly validating OS and architecture, throwing NotSupportedException for unsupported combinations:

Suggested fix

-            var weaverArch = RuntimeInformation.IsOSPlatform(OSPlatform.OSX)
-                ? (RuntimeInformation.ProcessArchitecture == Architecture.Arm64
-                    ? "aarch64-apple-darwin" : "x86_64-apple-darwin")
-                : "x86_64-unknown-linux-gnu";
+            var weaverArch = RuntimeInformation.IsOSPlatform(OSPlatform.OSX)
+                ? RuntimeInformation.ProcessArchitecture switch
+                {
+                    Architecture.Arm64 => "aarch64-apple-darwin",
+                    Architecture.X64 => "x86_64-apple-darwin",
+                    _ => throw new NotSupportedException(
+                        $"Unsupported macOS architecture: {RuntimeInformation.ProcessArchitecture}")
+                }
+                : RuntimeInformation.IsOSPlatform(OSPlatform.Linux)
+                    ? RuntimeInformation.ProcessArchitecture switch
+                    {
+                        Architecture.X64 => "x86_64-unknown-linux-gnu",
+                        _ => throw new NotSupportedException(
+                            $"Unsupported Linux architecture: {RuntimeInformation.ProcessArchitecture}")
+                    }
+                    : throw new NotSupportedException(
+                        $"Unsupported OS platform: {RuntimeInformation.OSDescription}");

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	var weaverArch = RuntimeInformation.IsOSPlatform(OSPlatform.OSX)
	? (RuntimeInformation.ProcessArchitecture == Architecture.Arm64
	? "aarch64-apple-darwin" : "x86_64-apple-darwin")
	: "x86_64-unknown-linux-gnu";
	var weaverBin = (AbsolutePath)(RootDirectory / ".tools" / "weaver" / $"weaver-{weaverArch}" / "weaver");
	var weaverArch = RuntimeInformation.IsOSPlatform(OSPlatform.OSX)
	? RuntimeInformation.ProcessArchitecture switch
	{
	Architecture.Arm64 => "aarch64-apple-darwin",
	Architecture.X64 => "x86_64-apple-darwin",
	_ => throw new NotSupportedException(
	$"Unsupported macOS architecture: {RuntimeInformation.ProcessArchitecture}")
	}
	: RuntimeInformation.IsOSPlatform(OSPlatform.Linux)
	? RuntimeInformation.ProcessArchitecture switch
	{
	Architecture.X64 => "x86_64-unknown-linux-gnu",
	_ => throw new NotSupportedException(
	$"Unsupported Linux architecture: {RuntimeInformation.ProcessArchitecture}")
	}
	: throw new NotSupportedException(
	$"Unsupported OS platform: {RuntimeInformation.OSDescription}");
	var weaverBin = (AbsolutePath)(RootDirectory / ".tools" / "weaver" / $"weaver-{weaverArch}" / "weaver");

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/build/BuildPipeline.cs` around lines 59 - 63, The platform selection for
the weaver binary in BuildPipeline.cs incorrectly defaults all non-macOS to
"x86_64-unknown-linux-gnu"; update the logic around weaverArch/weaverBin to
validate OS and Architecture explicitly (using RuntimeInformation.IsOSPlatform
and RuntimeInformation.ProcessArchitecture) and throw a NotSupportedException
for unsupported OS/architecture combinations (e.g., Windows or Linux Arm64) to
mirror bootstrap-weaver.sh behavior so the BuildPipeline fails fast with a clear
error instead of selecting the wrong binary.

[coderabbitai]

⚠️ Potential issue | 🟠 Major

Do not allow schema embedding to fail silently.

Line 88-Line 97 no-ops when the upstream schema file is missing, which can produce packages without the embedded schema while still reporting success. This should be a hard failure.

Suggested fix

             var schemaSource = RootDirectory / ".tools" / "semconv-upstream" / "schemas" / "1.40.0";
-            if (((string)schemaSource).Length > 0 && File.Exists(schemaSource))
+            if (!File.Exists(schemaSource))
+            {
+                throw new FileNotFoundException($"Schema source not found: {schemaSource}");
+            }
+            foreach (var pkg in new[] { "Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating" })
             {
-                foreach (var pkg in new[] { "Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating" })
-                {
-                    var schemasDir = RootDirectory / "packages" / pkg / "schemas";
-                    Directory.CreateDirectory(schemasDir);
-                    File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
-                }
+                var schemasDir = RootDirectory / "packages" / pkg / "schemas";
+                Directory.CreateDirectory(schemasDir);
+                File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
             }

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	var schemaSource = RootDirectory / ".tools" / "semconv-upstream" / "schemas" / "1.40.0";
	if (((string)schemaSource).Length > 0 && File.Exists(schemaSource))
	{
	foreach (var pkg in new[] { "Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating" })
	{
	var schemasDir = RootDirectory / "packages" / pkg / "schemas";
	Directory.CreateDirectory(schemasDir);
	File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
	}
	}
	var schemaSource = RootDirectory / ".tools" / "semconv-upstream" / "schemas" / "1.40.0";
	if (!File.Exists(schemaSource))
	{
	throw new FileNotFoundException($"Schema source not found: {schemaSource}");
	}
	foreach (var pkg in new[] { "Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating" })
	{
	var schemasDir = RootDirectory / "packages" / pkg / "schemas";
	Directory.CreateDirectory(schemasDir);
	File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
	}

🧰 Tools

🪛 GitHub Actions: CI

[error] 91-91: CA1861: Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🪛 GitHub Check: Backend (.NET)

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

---

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🪛 GitHub Check: Schema Drift (TypeSpec → Generated)

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

---

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/build/BuildPipeline.cs` around lines 88 - 97, The current embedding block
around schemaSource in BuildPipeline.cs silently skips embedding when the
upstream schema file is missing; change it to fail fast by validating that
schemaSource exists and throwing a clear exception (e.g., FileNotFoundException
or InvalidOperationException) with the schemaSource path when
File.Exists(schemaSource) is false before attempting the foreach/Copy loop;
locate the schemaSource initialization and the conditional that currently checks
((string)schemaSource).Length > 0 && File.Exists(schemaSource) and replace the
silent no-op with an explicit throw so packages cannot be produced without the
embedded schema.

[coderabbitai]

⚠️ Potential issue | 🟠 Major

Resolve CI-breaking CA1861 at the package loop.

Line 91 allocates a new constant array in the loop header and currently fails CI (CA1861). Replace it with explicit calls or a cached static source to remove repeated allocation and clear the analyzer gate.

Suggested fix (explicit calls, no array allocation)

-            foreach (var pkg in new[] { "Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating" })
-            {
-                var schemasDir = RootDirectory / "packages" / pkg / "schemas";
-                Directory.CreateDirectory(schemasDir);
-                File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
-            }
+            static void CopySchema(AbsolutePath root, string packageName, AbsolutePath source)
+            {
+                var schemasDir = root / "packages" / packageName / "schemas";
+                Directory.CreateDirectory(schemasDir);
+                File.Copy(source, schemasDir / "1.40.0.yaml", overwrite: true);
+            }
+
+            CopySchema(RootDirectory, "Qyl.OpenTelemetry.SemanticConventions", schemaSource);
+            CopySchema(RootDirectory, "Qyl.OpenTelemetry.SemanticConventions.Incubating", schemaSource);

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	foreach (var pkg in new[] { "Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating" })
	static void CopySchema(AbsolutePath root, string packageName, AbsolutePath source)
	{
	var schemasDir = root / "packages" / packageName / "schemas";
	Directory.CreateDirectory(schemasDir);
	File.Copy(source, schemasDir / "1.40.0.yaml", overwrite: true);
	}
	CopySchema(RootDirectory, "Qyl.OpenTelemetry.SemanticConventions", schemaSource);
	CopySchema(RootDirectory, "Qyl.OpenTelemetry.SemanticConventions.Incubating", schemaSource);

🧰 Tools

🪛 GitHub Actions: CI

[error] 91-91: CA1861: Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🪛 GitHub Check: Backend (.NET)

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

---

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🪛 GitHub Check: Schema Drift (TypeSpec → Generated)

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

---

[failure] 91-91:
Prefer 'static readonly' fields over constant array arguments if the called method is called repeatedly and is not mutating the passed array (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1861)

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/build/BuildPipeline.cs` at line 91, The foreach currently allocates a new
array in the loop header (foreach (var pkg in new[] {
"Qyl.OpenTelemetry.SemanticConventions",
"Qyl.OpenTelemetry.SemanticConventions.Incubating" })) which triggers CA1861;
fix it by replacing the inline array with a reuseable source such as a private
static readonly string[] field (e.g., private static readonly string[]
SemanticConventionPkgs = { "Qyl.OpenTelemetry.SemanticConventions",
"Qyl.OpenTelemetry.SemanticConventions.Incubating" }) and iterate over
SemanticConventionPkgs in the foreach, or alternatively call the operation
explicitly twice for each package name to avoid any array allocation; reference
the foreach block and the package names when applying the change.

[coderabbitai]

⚠️ Potential issue | 🟠 Major

Use a longer fingerprint than sha256[:8] for audit correlation.

sha256[:8] is only 32 bits. Once the number of issued keys grows, collisions become realistic and the audit trail can attribute activity to the wrong credential. Standardize this field on a longer fingerprint (at least 64 bits, preferably 128 bits) or a stable server-side key id instead.

Proposed spec change

-          First 8 characters of the API key hash (sha256[:8]).
+          First 32 characters of the API key hash (sha256[:32]).
           Never log the full key. Used for audit trails only.
-        examples: ['a1b2c3d4']
+        examples: ['a1b2c3d4e5f60718b9c0d1e2f3a4b5c6']

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	brief: >
	First 8 characters of the API key hash (sha256[:8]).
	Never log the full key. Used for audit trails only.
	examples: ['a1b2c3d4']
	brief: >
	First 32 characters of the API key hash (sha256[:32]).
	Never log the full key. Used for audit trails only.
	examples: ['a1b2c3d4e5f60718b9c0d1e2f3a4b5c6']

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/semconv/qyl/model/api_key.yaml` around lines 10 - 13, The audit
fingerprint for API keys in eng/semconv/qyl/model/api_key.yaml is too short
(sha256[:8]); update the spec text and example to use a longer,
collision-resistant fingerprint (at minimum sha256[:16] for 64 bits, preferably
sha256[:32] for 128 bits) or switch to a stable server-side key id; specifically
change the brief from "First 8 characters of the API key hash (sha256[:8])" to
indicate the chosen longer slice (e.g., "First 16 characters of the API key hash
(sha256[:16])" or "First 32 characters (sha256[:32])") and update the examples
array (e.g., from 'a1b2c3d4' to a matching-length hex sample) and any consumers
that parse or generate this fingerprint (look for references to the api_key
fingerprint field/name in validation/parsing code).

[coderabbitai]

⚠️ Potential issue | 🟡 Minor

Missing stability: experimental on follow_up member.

The starting member (line 20) has stability: experimental, but follow_up does not. This inconsistency may cause generation issues depending on how the template filters members.

            - id: follow_up
              value: 'FollowUp'
              brief: 'Capability that follows another in a workflow'
+             stability: experimental

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/semconv/qyl/model/capability.yaml` around lines 21 - 23, The member with
id 'follow_up' is missing the stability tag; add "stability: experimental" to
the 'follow_up' mapping (same level as id/value/brief) so it matches the
'starting' member; ensure YAML indentation aligns with the other members (i.e.,
add stability: experimental under the follow_up entry alongside id/value/brief).

[coderabbitai]

🛠️ Refactor suggestion | 🟠 Major

Inconsistent deprecation handling for members vs attributes.

Attribute-level deprecation (lines 20-27) has structured reason-based logic (renamed, obsoleted, fallback to note), but member-level deprecation (line 38) just stringifies the entire member.deprecated object. This creates inconsistent [Obsolete] messages.

Compare with the attribute handling above it—member deprecation should follow the same pattern for uniform output.

 {% for member in attr.type.members | sort(attribute="value") %}
         /// <summary>{{ member.brief | replace('&', '&amp;') | replace('<', '&lt;') | replace('>', '&gt;') | replace('\n', ' ') | trim }}.</summary>
 {% if member.deprecated %}
+{% if member.deprecated.reason == "renamed" %}
+        [global::System.Obsolete("Replaced by {{ member.deprecated.renamed_to }}.", false)]
+{% elif member.deprecated.reason == "obsoleted" %}
+        [global::System.Obsolete("Removed, no replacement.", false)]
+{% else %}
+        [global::System.Obsolete({{ member.deprecated.note | replace('\n', ' ') | trim | tojson }}, false)]
+{% endif %}
-        [global::System.Obsolete({{ member.deprecated | string | tojson }}, false)]
 {% endif %}

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/semconv/templates/registry/csharp_qyl/attributes.cs.j2` around lines 37 -
41, The member-level Obsolete emission currently stringifies member.deprecated;
change it to mirror the attribute-level deprecation logic: inspect
member.deprecated for keys (renamed, obsoleted, note) and build a structured
message (e.g., "Renamed to <newName>" when renamed, "Obsoleted: <reason>" when
obsoleted, fallback to note) then pass that message into the
[global::System.Obsolete(..., false)] call for the constant whose identifier is
member.id and value is member.value so member-level deprecation messages match
attribute-level formatting.

[coderabbitai]

🛠️ Refactor suggestion | 🟠 Major

Move schema_version out of the template config and into a single build-owned source.

This literal becomes another manual source of truth. Once eng/semconv/qyl/model/**/*.yaml changes again, SchemaVersion.Current can silently lie unless someone remembers to bump this file in lockstep. Feed schema_version from the NUKE pipeline or a shared version prop, and fail generation when the model changes without a version bump. As per coding guidelines, eng/**: Build and deployment infrastructure. Review for: correct MSBuild property usage, Nuke build target dependencies, Docker multi-stage build efficiency, and CI/CD pipeline correctness. Flag hardcoded paths, secrets, or platform-specific assumptions.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/semconv/templates/registry/csharp_qyl/weaver.yaml` around lines 9 - 11,
Remove the hardcoded params.schema_version from the template and instead read
the canonical schema version from a single build-owned source (e.g., a NUKE
variable or MSBuild property passed into generation as a parameter), update
generation to inject that value where schema_version was used, and add a
generation-time check that compares the model checksum (or timestamps) against
SchemaVersion.Current and fails the build if the model changed without bumping
that property so generation cannot silently use an out-of-date
SchemaVersion.Current.

[coderabbitai]

🧹 Nitpick | 🔵 Trivial

Duplication across three templates.

The stable, incubating, and QYL templates share ~90% identical Jinja logic (XML escaping, deprecation handling, member generation). Only the stability filter differs. Consider extracting shared logic into a Jinja macro file to reduce maintenance burden and prevent drift between the three variants.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/semconv/templates/registry/csharp_stable/attributes.cs.j2` around lines 1
- 50, The template duplicates nearly all Jinja logic; refactor by extracting the
shared rendering into a reusable macro file (e.g., create a macros jinja file
and import it) so the three templates (stable/incubating/qyl) only differ by the
stability filter. Move the XML-escaping/summary generation, deprecation handling
(the Obsolete branches), member loop that generates "{{ local_name }}Values" and
member constants, and the local_name/_stripped logic into a macro (accepting the
attribute list or a stability argument), then have attributes.cs.j2 call that
macro with stable_attrs (or the appropriate filtered list) instead of
duplicating the block that generates public const string {{ local_name }} and
the nested {{ local_name }}Values class.

[coderabbitai]

🛠️ Refactor suggestion | 🟠 Major

Same member deprecation inconsistency as other templates.

Line 41 stringifies member.deprecated directly instead of using the structured reason-based logic applied to attributes (lines 23-30). This produces different [Obsolete] message formats for attributes vs their enum members.

 {% if member.deprecated %}
-        [global::System.Obsolete({{ member.deprecated | string | tojson }}, false)]
+{% if member.deprecated.reason == "renamed" %}
+        [global::System.Obsolete("Replaced by {{ member.deprecated.renamed_to }}.", false)]
+{% elif member.deprecated.reason == "obsoleted" %}
+        [global::System.Obsolete("Removed, no replacement.", false)]
+{% else %}
+        [global::System.Obsolete({{ member.deprecated.note | replace('\n', ' ') | trim | tojson }}, false)]
+{% endif %}
 {% endif %}

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	{% if member.deprecated %}
	[global::System.Obsolete({{ member.deprecated | string | tojson }}, false)]
	{% endif %}
	{% if member.deprecated %}
	{% if member.deprecated.reason == "renamed" %}
	[global::System.Obsolete("Replaced by {{ member.deprecated.renamed_to }}.", false)]
	{% elif member.deprecated.reason == "obsoleted" %}
	[global::System.Obsolete("Removed, no replacement.", false)]
	{% else %}
	[global::System.Obsolete({{ member.deprecated.note | replace('\n', ' ') | trim | tojson }}, false)]
	{% endif %}
	{% endif %}

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/semconv/templates/registry/csharp_stable/attributes.cs.j2` around lines
40 - 42, The template emits inconsistent Obsolete messages by stringifying
member.deprecated in attributes.cs.j2; update the conditional that generates the
[global::System.Obsolete(...)] for enum members to use the same structured
reason-based logic used earlier for attributes (the logic around lines 23-30)
instead of directly stringifying member.deprecated—i.e., detect whether a
deprecation reason exists and emit either Obsolete("reason", false) or
Obsolete(false) accordingly so enum member deprecation messages match attribute
deprecation messages.

[coderabbitai]

♻️ Duplicate comments (2)

eng/build/BuildPipeline.cs (2)

57-64: ⚠️ Potential issue | 🟠 Major

Fail fast on unsupported Weaver platforms.

bootstrap-weaver.sh only supports macOS arm64/x64 and Linux x64, but this fallback still maps every non-macOS build to x86_64-unknown-linux-gnu. On Windows or Linux Arm64, GenerateSemconv will select the wrong binary and fail later with a misleading process error instead of a clear NotSupportedException.

Suggested fix

-            var weaverArch = RuntimeInformation.IsOSPlatform(OSPlatform.OSX)
-                ? (RuntimeInformation.ProcessArchitecture == Architecture.Arm64
-                    ? "aarch64-apple-darwin" : "x86_64-apple-darwin")
-                : "x86_64-unknown-linux-gnu";
+            var weaverArch =
+                RuntimeInformation.IsOSPlatform(OSPlatform.OSX)
+                    ? RuntimeInformation.ProcessArchitecture switch
+                    {
+                        Architecture.Arm64 => "aarch64-apple-darwin",
+                        Architecture.X64 => "x86_64-apple-darwin",
+                        _ => throw new NotSupportedException(
+                            $"Unsupported macOS architecture: {RuntimeInformation.ProcessArchitecture}")
+                    }
+                    : RuntimeInformation.IsOSPlatform(OSPlatform.Linux)
+                        ? RuntimeInformation.ProcessArchitecture switch
+                        {
+                            Architecture.X64 => "x86_64-unknown-linux-gnu",
+                            _ => throw new NotSupportedException(
+                                $"Unsupported Linux architecture: {RuntimeInformation.ProcessArchitecture}")
+                        }
+                        : throw new NotSupportedException(
+                            $"Unsupported OS platform: {RuntimeInformation.OSDescription}");

As per coding guidelines, eng/**: Build and deployment infrastructure. Review for: correct MSBuild property usage, Nuke build target dependencies, Docker multi-stage build efficiency, and CI/CD pipeline correctness. Flag hardcoded paths, secrets, or platform-specific assumptions.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/build/BuildPipeline.cs` around lines 57 - 64, The current platform
mapping sets every non-macOS OS to "x86_64-unknown-linux-gnu" causing wrong
binary selection (weaverArch/weaverBin) on unsupported platforms; update the
logic in the block that computes weaverArch to explicitly handle supported
combos (macOS x64/arm64 and Linux x64) and throw a NotSupportedException (or
equivalent) for any other OS/Architecture (e.g., Windows, Linux Arm64) so
GenerateSemconv fails fast with a clear error rather than selecting a wrong
binary; ensure you reference the same variables weaverArch and weaverBin so
downstream code uses the validated value.

---

88-99: ⚠️ Potential issue | 🟠 Major

Do not silently ship packages without the embedded schema.

If .tools/semconv-upstream/schemas/1.40.0 is missing, this block becomes a successful no-op. That turns a bad generator environment into incomplete NuGet packages instead of a deterministic build failure.

Suggested fix

             var schemaSource = RootDirectory / ".tools" / "semconv-upstream" / "schemas" / "1.40.0";
-            if (((string)schemaSource).Length > 0 && File.Exists(schemaSource))
+            if (!File.Exists(schemaSource))
             {
-                ReadOnlySpan<string> otelPackages = ["Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating"];
-                foreach (var pkg in otelPackages)
-                {
-                    var schemasDir = RootDirectory / "packages" / pkg / "schemas";
-                    Directory.CreateDirectory(schemasDir);
-                    File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
-                }
+                throw new FileNotFoundException($"Schema source not found: {schemaSource}");
             }
+
+            ReadOnlySpan<string> otelPackages = ["Qyl.OpenTelemetry.SemanticConventions", "Qyl.OpenTelemetry.SemanticConventions.Incubating"];
+            foreach (var pkg in otelPackages)
+            {
+                var schemasDir = RootDirectory / "packages" / pkg / "schemas";
+                Directory.CreateDirectory(schemasDir);
+                File.Copy(schemaSource, schemasDir / "1.40.0.yaml", overwrite: true);
+            }

As per coding guidelines, eng/**: Build and deployment infrastructure. Review for: correct MSBuild property usage, Nuke build target dependencies, Docker multi-stage build efficiency, and CI/CD pipeline correctness. Flag hardcoded paths, secrets, or platform-specific assumptions.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@eng/build/BuildPipeline.cs` around lines 88 - 99, The current block around
schemaSource and otelPackages can silently no-op when the upstream schema is
missing; change it to fail the build instead of continuing quietly: check
File.Exists(schemaSource) (or Directory.Exists if schemaSource should be a
directory) and if the schema file is not present throw a clear exception (e.g.,
InvalidOperationException with a message referencing schemaSource and the
required version) before iterating otelPackages; keep the existing logic that
creates schemasDir and copies the file (refer to variables schemaSource,
otelPackages, RootDirectory and the enclosing BuildPipeline code) so missing
upstream schemas produce a deterministic build failure.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Duplicate comments:
In `@eng/build/BuildPipeline.cs`:
- Around line 57-64: The current platform mapping sets every non-macOS OS to
"x86_64-unknown-linux-gnu" causing wrong binary selection (weaverArch/weaverBin)
on unsupported platforms; update the logic in the block that computes weaverArch
to explicitly handle supported combos (macOS x64/arm64 and Linux x64) and throw
a NotSupportedException (or equivalent) for any other OS/Architecture (e.g.,
Windows, Linux Arm64) so GenerateSemconv fails fast with a clear error rather
than selecting a wrong binary; ensure you reference the same variables
weaverArch and weaverBin so downstream code uses the validated value.
- Around line 88-99: The current block around schemaSource and otelPackages can
silently no-op when the upstream schema is missing; change it to fail the build
instead of continuing quietly: check File.Exists(schemaSource) (or
Directory.Exists if schemaSource should be a directory) and if the schema file
is not present throw a clear exception (e.g., InvalidOperationException with a
message referencing schemaSource and the required version) before iterating
otelPackages; keep the existing logic that creates schemasDir and copies the
file (refer to variables schemaSource, otelPackages, RootDirectory and the
enclosing BuildPipeline code) so missing upstream schemas produce a
deterministic build failure.

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 9f1f7074-95ee-4105-8ffe-64094799136a

📥 Commits

Reviewing files that changed from the base of the PR and between abdbe4c and 17e05d0.

📒 Files selected for processing (1)

• eng/build/BuildPipeline.cs

📜 Review details

🧰 Additional context used

📓 Path-based instructions (2)

**/*.cs

📄 CodeRabbit inference engine (AGENTS.md)

**/*.cs: For arbitrary non-chat methods/metrics, use attribute-based instrumentation ([Traced]/[Meter]/[Counter]/etc.) only where no builder surface exists.
New .cs files must be UTF-8 with BOM encoding. .editorconfig declares charset = utf-8-bom under [*.cs].
Use // Copyright (c) 2025-2026 ancplua copyright header on top of .cs files.
XML documentation is required on all public methods and classes in C# files.
Use the Async suffix for any method returning Task / ValueTask, including test methods.
Declare private classes as sealed unless intentionally subclassed.
Environment variables use UPPER_SNAKE_CASE (e.g., QYL_AGENT_MAX_DEPTH, OTEL_EXPORTER_OTLP_ENDPOINT).
C# 14 with preview features enabled. Use file-scoped namespaces, primary constructors, required init properties, pattern matching, switch expressions over if-else.
No suppression: No #pragma warning disable, no [SuppressMessage], no <NoWarn> (exception: upstream sample repos demonstrating experimental APIs).
Never use runtime reflection as a control mechanism, dynamic / ExpandoObject, blocking async (.Result / .Wait()), or any analyzer besides ANcpLua.Analyzers.
Do not suppress null ! when the code can be rewritten to avoid the suppression.
Never hand-register a tool. Instead, add [QylSkill] + [QylCapability] attributes and let the generator handle DI registration, MCP tool registration, and capability catalogs.
No attribute-based agent tracing—[AgentTraced] was removed in the 2026-04 collapse. Use fluent middleware instead.
InvestigationLineage (AsyncLocal) enforces max depth (3), root spawn budget (10), cycle detection. Tools call InvestigationLineage.TryEnter() before starting investigations.
Environment overrides for bounded autonomy: QYL_AGENT_MAX_DEPTH, QYL_AGENT_MAX_SPAWNS.
Construct LoomToolEnvelope results via the non-generic companion — LoomToolEnvelope.Ok(data) / LoomToolEnvelope.Fail<T>(error). NEVER `LoomToolEnvelope....

Files:

• eng/build/BuildPipeline.cs

eng/**

⚙️ CodeRabbit configuration file

Build and deployment infrastructure. Review for: correct MSBuild property usage, Nuke build target dependencies, Docker multi-stage build efficiency, and CI/CD pipeline correctness. Flag hardcoded paths, secrets, or platform-specific assumptions.

Files:

• eng/build/BuildPipeline.cs

🧠 Learnings (13)

📓 Common learnings

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.{csproj,package.json} : Do not replace external dependencies: `Microsoft.Agents.AI`, `Microsoft.Agents.AI.Hosting`, `Microsoft.Extensions.AI`, `ModelContextProtocol` 1.1.0, `OpenTelemetry` SDK 1.15.0 + Semantic Conventions 1.40, `DuckDB.NET` 1.5.0, `Base UI` 1.3.0 + `lucide-react`, `xUnit v3` + `Microsoft.Testing.Platform`.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Chat,Agent,Client,Instrumentation,Telemetry}*.cs : Emit OTel GenAI semconv 1.40 with required attributes: `gen_ai.system`, `gen_ai.request.model`, `gen_ai.response.model`, `gen_ai.usage.input_tokens`, `gen_ai.usage.output_tokens`, `gen_ai.operation.name`, `gen_ai.tool.call.id`, `gen_ai.tool.name`, `gen_ai.agent.name`, `gen_ai.agent.id`.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Builder,Composition,Startup,Program}.cs : Replace attribute-based agent telemetry (`[AgentTraced]` + generators) with MAF's fluent middleware pipeline: `.AsBuilder().UseOpenTelemetry("qyl.agent").Build()` at the composition root.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to src/qyl.contracts/**/*.cs : `Qyl.contracts` is at the bottom (BCL-only, no MAF, no OTel SDK). Do not let MAF types leak into `qyl.contracts`.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: CLAUDE.md:0-0
Timestamp: 2026-04-22T13:16:07.510Z
Learning: Applies to **/*.generators/*.cs : Generator discipline: Use `IIncrementalGenerator` only, `ForAttributeWithMetadataName`, value-equatable models, and raw strings over `SyntaxFactory`. Never store `ISymbol` in models. Test generators via `ANcpLua.Roslyn.Utilities` test infrastructure.

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/generators/**/*.cs : Use `IIncrementalGenerator` only. Enforce `ForAttributeWithMetadataName`, value-equatable models, raw strings over `SyntaxFactory`. Never store `ISymbol` in models.

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*{Chat,Agent,Client,Instrumentation,Telemetry}*.cs : Emit OTel GenAI semconv 1.40 with required attributes: `gen_ai.system`, `gen_ai.request.model`, `gen_ai.response.model`, `gen_ai.usage.input_tokens`, `gen_ai.usage.output_tokens`, `gen_ai.operation.name`, `gen_ai.tool.call.id`, `gen_ai.tool.name`, `gen_ai.agent.name`, `gen_ai.agent.id`.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/*.{csproj,package.json} : Do not replace external dependencies: `Microsoft.Agents.AI`, `Microsoft.Agents.AI.Hosting`, `Microsoft.Extensions.AI`, `ModelContextProtocol` 1.1.0, `OpenTelemetry` SDK 1.15.0 + Semantic Conventions 1.40, `DuckDB.NET` 1.5.0, `Base UI` 1.3.0 + `lucide-react`, `xUnit v3` + `Microsoft.Testing.Platform`.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-22T13:16:07.509Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: CLAUDE.md:0-0
Timestamp: 2026-04-22T13:16:07.509Z
Learning: Applies to **/*.g.{cs,tsp,sql,ts} : `nuke Generate` is idempotent and regenerates `.g.cs`, `openapi.yaml`, and DuckDB DDL. Never hand-edit generated files (`*.g.cs`, `*.g.tsp`, `*.g.sql`, `*.g.ts`, `core/openapi/openapi.yaml`). Fix the generator input instead.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/generators/**/*.cs : Use `IIncrementalGenerator` only. Enforce `ForAttributeWithMetadataName`, value-equatable models, raw strings over `SyntaxFactory`. Never store `ISymbol` in models.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-22T13:16:07.510Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: CLAUDE.md:0-0
Timestamp: 2026-04-22T13:16:07.510Z
Learning: Applies to **/*.generators/*.cs : Generator discipline: Use `IIncrementalGenerator` only, `ForAttributeWithMetadataName`, value-equatable models, and raw strings over `SyntaxFactory`. Never store `ISymbol` in models. Test generators via `ANcpLua.Roslyn.Utilities` test infrastructure.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-22T13:16:07.510Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: CLAUDE.md:0-0
Timestamp: 2026-04-22T13:16:07.510Z
Learning: Applies to **/*.cs : No suppression: Do not use `#pragma warning disable`, `[SuppressMessage]`, or `<NoWarn>`. Exception: upstream sample repos demonstrating experimental APIs. Use `WarningsAsErrors=CA1816;CA2012;CA2016` (or add more rules, never subtract).

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-22T13:16:32.373Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: services/qyl.mcp/CLAUDE.md:0-0
Timestamp: 2026-04-22T13:16:32.373Z
Learning: Applies to services/qyl.mcp/**/*.cs : `CreateTools(IServiceProvider, Func<Type, bool>)` emit must be preserved; two load-bearing consumers (`Tools/UseQylTools.cs` + `Tools/RcaTools.cs`) materialize `List<AIFunction>` for embedded-agent `UseFunctionInvocation` loops

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to src/qyl.contracts/**/*.cs : `Qyl.contracts` is at the bottom (BCL-only, no MAF, no OTel SDK). Do not let MAF types leak into `qyl.contracts`.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Use `nuke Generate` to regenerate TypeSpec + Roslyn outputs. It is idempotent—run it any time. It regenerates `.g.cs`, `openapi.yaml`, and DuckDB DDL.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-22T13:16:32.373Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: services/qyl.mcp/CLAUDE.md:0-0
Timestamp: 2026-04-22T13:16:32.373Z
Learning: Applies to services/qyl.mcp/**/internal/qyl.mcp.generators/**/*.cs : Generator `internal/qyl.mcp.generators/` must emit `QylToolManifest` with `ToolTypes[]`, `ToolDescriptors[]`, `RegisterTools(...)`, `RegisterServices(...)`, and `CreateTools(...)`

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.978Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.978Z
Learning: Dependency direction is one-way: `qyl.contracts` at the bottom (BCL-only), generators in their own projects (no runtime deps), runtime projects depend on contracts + generator outputs.

Applied to files:

• eng/build/BuildPipeline.cs

📚 Learning: 2026-04-21T06:24:06.977Z

Learnt from: CR
Repo: Alexander-Nachtmann/qyl PR: 0
File: AGENTS.md:0-0
Timestamp: 2026-04-21T06:24:06.977Z
Learning: Applies to **/tests/**{Generator,Generator.Tests}/**/*.cs : Test generators via `ANcpLua.Roslyn.Utilities` test infrastructure.

Applied to files:

• eng/build/BuildPipeline.cs