chore: update Project Standards packages

[chrisdpurcell]

Updates every configured Project Standards package selector to latest, refreshes Catalog 5 to the current 5.19.0 release, and reconciles managed outputs.\n\nVerification:\n- project-standards reconcile --check --json (ok=true, drift=false, zero findings)\n- project-standards agent-handoff validate --repo .\n- project-standards agent-handoff drift-check --repo .\n- git diff --check

Summary by CodeRabbit

• New Features

  • Session-start handoff now runs through the standardized executable hook.
  • Added GitHub workflow standards to the supported standards catalog.

• Bug Fixes

  • Improved strict JSON validation by rejecting documents nested beyond the supported recursion limit with clearer errors.

• Documentation

  • Updated agent-handoff and Markdown frontmatter guidance to current standards.
  • Refreshed supported standards and locked configurations with newer versions.

• Chores

  • Improved formatting and linting commands by limiting checks to relevant tracked or source files.
  • Expanded Python tooling configuration for improved path resolution and explicit Ruff settings.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 1a2cdff4-3e65-4830-8a4c-3bb78f3bd13a

📥 Commits

Reviewing files that changed from the base of the PR and between 17ec356 and e0dc994.

📒 Files selected for processing (2)

• src/docmend/scale_stage.py
• tests/test_scale_stage_runner.py

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📝 Walkthrough

Walkthrough

The Python session-start hook was removed. Claude and Codex now invoke session-start directly. Standards metadata was upgraded to release 5.19.0. Repository validation commands now use bounded scopes. Strict JSON parsing now rejects excessively deep documents.

Changes

Repository configuration and validation updates

Layer / File(s)	Summary
Session-start hook wiring .agents/skills/agent-handoff/SKILL.md, .claude/settings.json, .codex/config.toml	The documented and configured hook path now targets the executable session-start command.
Standards catalog and lock refresh .standards/catalog.toml, .standards/lock.toml, .standards/packages/markdown-frontmatter/agent-summary.md, .agents/skills/markdown-frontmatter/SKILL.md	Standards resolve to release 5.19.0 with newer versions, artifact records, digests, and Markdown Frontmatter references.
Scoped validation tooling AGENTS.md, CLAUDE.md, .vscode/tasks.json, pyproject.toml, scripts/check.py, .github/workflows/dependency-review.yml	Formatting and linting commands use Git-tracked or bounded source scopes. Ruff and Basedpyright configuration records the updated paths. The dependency-review workflow only changes whitespace.
Strict JSON depth validation src/docmend/scale_stage.py, tests/test_scale_stage_runner.py	JSON validation tracks nesting depth and raises a strict-JSON StageContractError for excessively deep decoded documents. The test covers the request loader path.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to e0dc9

This PR updates Project Standards package selectors and managed outputs, with reconciliation and validation checks passing; no actionable merge-blocking risk remains beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the primary change: updating Project Standards packages and their managed catalog outputs.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
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.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/project-standards-latest-20260815

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