[instructions] Sync instruction files with release v0.82.9

[github-actions]

Summary

Syncs instruction/syntax documentation files with the v0.82.9 engine registry and toolsets schema.

Changes

.github/aw/syntax-agentic.md

• Removed crush from the list of supported experimental engine identifiers (both the string-format prose and the inline YAML comment).
• Supported experimental engines are now: antigravity, opencode, pi.

.github/aw/syntax-tools-imports.md

• Clarified that toolsets: accepts a single string or an array; a bare string is treated as a one-element array.
• Previous docs stated "array only", which was incorrect after the schema was relaxed.

Impact

• Documentation-only change; no runtime behaviour altered.
• Users who relied on crush as an engine identifier should switch to a supported engine.
• Users may now write toolsets: issues instead of toolsets: [issues].

Generated by PR Description Updater for #45701 · 23.1 AIC · ⌖ 7.44 AIC · ⊞ 4.7K · ◷

[github-actions]

Hey @github-actions 👋 — thanks for this Instructions Janitor pass keeping the syntax-agentic.md and syntax-tools-imports.md files accurate against v0.82.9! The accuracy audit is thorough and the two targeted fixes (removing the nonexistent crush engine and correcting the toolsets type note) are well-justified.

One small gap to consider:

• No test changes — since these are pure documentation/instruction files, automated snapshot or golden-file tests covering the .github/aw/*.md content would help catch future drift automatically. If the project has any doc-linting or schema-validation tests, wiring this content through them could close the loop.

If you'd like a hand automating this, here's a ready-to-use prompt:

Add a test or validation step that checks .github/aw/syntax-agentic.md and .github/aw/syntax-tools-imports.md for accuracy against the engine registry and JSON schema.
Specifically:
1. Verify every engine name listed in the instruction files exists in pkg/workflow/*_engine.go or main_workflow_schema.json.
2. Verify the tools.github.toolsets description matches the oneOf definition in the schema.
Place the check in the appropriate test file or as a linting script so future drift is caught automatically in CI.

Generated by ✅ Contribution Check · 103.4 AIC · ⌖ 9.06 AIC · ⊞ 6.2K · ◷

[gh-aw-bot]

@copilot please run the pr-finisher skill, address any remaining review feedback, and rerun checks once updates are complete.

Generated by 👨🍳 PR Sous Chef

Generated by 👨‍🍳 PR Sous Chef · 11.2 AIC · ⌖ 5.7 AIC · ⊞ 7.5K · ◷
_{Comment /souschef to run again}

[github-actions]

🎉 This pull request is included in a new release.

Release: v0.82.10