feat: lean CLAUDE.md by default + standalone variant for contributors

[lchoquel]

Summary

• Make make rules produce a lean CLAUDE.md that omits Python and pytest standards (Pipelex maintainers already get those from the workspace's .claude/rules/).
• Keep AGENTS.md with the full standards inline for non-Claude agents.
• Add make rules-claude-standalone for contributors without the workspace — regenerates CLAUDE.md with everything inline.
• Drop tdd.md from all generated rule sets.

Implementation: uses the existing per-target set override mechanism ([agent_rules.targets.<id>.sets]) plus a new --targets CLI filter on pipelex-dev kit rules so the standalone command regenerates only CLAUDE.md.

Test plan

• make tb — config boot sanity
• make agent-check — ruff, plxt, pyright, mypy all clean
• pytest tests/unit/pipelex/kit/ tests/integration/pipelex/kit/ — 22 passed (incl. 4 new in test_target_set_overrides.py)
• make rules → lean CLAUDE.md (no Python/pytest/TDD), AGENTS.md keeps full standards (TDD removed)
• make rules-claude-standalone → full CLAUDE.md, AGENTS.md untouched
• make check-rules → passes against the lean baseline

🤖 Generated with Claude Code

---

Summary by cubic

Make CLAUDE.md lean by default and add a standalone option for contributors. Adds --targets to pipelex-dev kit rules and makes Cursor cleanup safer and idempotent.

• New Features

  • make rules generates a lean CLAUDE.md; AGENTS.md keeps Python/pytest.
  • make rules-claude-standalone regenerates CLAUDE.md with the full ruleset (targets only claude).
  • pipelex-dev kit rules --targets updates a subset of preferred targets with validation; cleanup keep-set remains the full preferences.
  • Per-target sets for claude in index.toml: all (lean) and standalone (full).
  • Drop tdd.md. Cursor .mdc files add pipelex_managed: true; cleanup also honors agent_rules.deprecated_rule_stems (e.g. ["tdd"]) and removes pre-marker files safely.

• Migration

  • Commit the lean CLAUDE.md from make rules; this is canonical.
  • If you’re contributing without the workspace, run make rules-claude-standalone locally; do not commit it.
  • Use pipelex-dev kit rules --targets claude to limit regeneration when needed.

^{Written for commit df48c52. Summary will update on new commits. Review in cubic}

[greptile-apps]

Greptile Summary

This PR changes how Pipelex agent rules are generated and adds a standalone Claude rules option. The main changes are:

• Lean CLAUDE.md by default while keeping full standards in AGENTS.md.
• Add make rules-claude-standalone and a --targets CLI filter for selective regeneration.
• Remove TDD rules from generated rule sets.
• Add Cursor cleanup markers and deprecated rule tombstones for stale generated files.
• Add gemini-3.5-flash to the Google backend config and generated model references.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
pipelex/cli/dev_cli/commands/kit_cmd.py	Keeps the cleanup keep-set separate from the filtered update targets.
pipelex/kit/cursor_rules.py	Adds managed markers and deprecated-stem cleanup for generated Cursor rule files.
pipelex/kit/index.toml	Defines lean and standalone Claude rule sets and removes TDD from generated sets.
.pipelex/inference/backends/google.toml	Adds the gemini-3.5-flash Google model entry.

_{Reviews (3): Last reviewed commit: "Merge branch 'dev' into feature/Rules" | Re-trigger Greptile}

[chatgpt-codex-connector]

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[cubic-dev-ai]

1 issue found across 8 files

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