docs: add missing assign_work_item.rs to AGENTS.md architecture tree

[github-actions]

Agent Documentation Update

Findings

Area	Issue	File(s)
accuracy	src/safe_outputs/assign_work_item.rs (a real, registered safe-output tool module — declared via mod assign_work_item; in src/safe_outputs/mod.rs, used by assign_work_item in src/mcp.rs, and documented as assign-work-item in docs/safe-outputs.md) was missing from the AGENTS.md architecture tree's safe_outputs/ file listing	AGENTS.md

Applied Fixes

• Added assign_work_item.rs to the safe_outputs/ tree in AGENTS.md, in its correct alphabetical position between assign_github_issue_to_user.rs and close_github_issue.rs

Notes

Verified by diffing find src -type f against every leaf filename listed in the AGENTS.md tree — this was the only stale/missing entry found. Cross-checked the rest of the doc surface for drift and found none:

• docs/cli.md matches the current Commands/SecretsCmd/GraphCmd clap enums in src/main.rs exactly (subcommands, flags, defaults, hidden build-time/pipeline-internal commands).
• docs/front-matter.md covers every FrontMatter field in src/compile/types.rs.
• docs/safe-outputs.md documents every tool file under src/safe_outputs/ (including assign_work_item.rs itself, as assign-work-item).
• prompts/*.md workflow-authoring guides delegate to docs/ and src/engine.rs rather than duplicating details, so no drift there.

No source-code changes were made; this is a documentation-only fix within AGENTS.md.

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Created by the agent-documentation maintainer workflow.

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