feat(ruler): distribute a profile's rules into every agent's native rule file#95
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June 30, 2026 12:25
…ule file Add `cue ruler` — concatenates the active profile's rules[] (from resources/rules/) with `<!-- Source: -->` markers and writes them into each target agent's native rule file (CLAUDE.md, AGENTS.md, .cursorrules, .clinerules, ...). The good idea from intellectronica/ruler, made cue-native. - whole-file write + .bak backup; `--revert` restores/removes (marker-gated, so a hand-written file is never deleted) - agents sharing a file (codex+amp -> AGENTS.md) are written once - path-confined to resources/rules/ (no ../ or absolute escape) - adds rulesFile() to all 10 agent adapters - flags: --all / --agents / --dir / --dry-run / --gitignore / --revert / --profile 20 unit tests; biome + typecheck clean.
Phase 2: when CUE_RULER_AUTO is set (1|true|on|auto), `cue launch` mirrors the profile's rules into the project's agent rule files after materialize, before exec — so other agents stay in sync without a manual `cue ruler`. Safe mode (never clobbers a hand-written file): - writes only when the target is absent or cue-generated (marker must be at the file START, so a file that merely quotes the marker is treated as foreign) - idempotent (skip-current); no .bak churn; fail-open (a ruler error never blocks or slows launch); honors --dry-run (previews "would sync", no writes) - OFF by default — unset env = zero behavior change Adds applyRuler mode:'safe', runAutoRuler, isRulerAutoEnabled, isCueGenerated helper. 11 new tests (31 total). biome + typecheck clean.
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What
Adds
cue ruler— distributes the active profile'srules[](fromresources/rules/) into every target agent's native rule file (CLAUDE.md, AGENTS.md,.cursorrules,.clinerules, …). Closes the gap where cue's rule library only reached Claude whilematerializealready fanned skills+MCPs to 10 agents. The good idea from intellectronica/ruler, made cue-native.Phase 1 — the
cue rulercommandgatherRules→concatRules(<!-- Source: -->markers) →applyRuler/revertRulerin newsrc/lib/ruler.ts.src/commands/ruler.tsmirrorsmaterialize.ts:--all/--agents/--dir/--dry-run/--gitignore/--revert/--profile.rulesFile()to theAgentAdapterinterface + all 10 adapters..bak;--revertmarker-gated; shared-file agents (codex+amp → AGENTS.md) written once; refs path-confined toresources/rules/.Phase 2 — auto on
cue launch(gated, safe)CUE_RULER_AUTO=1(1|true|on|auto) →cue launchmirrors the profile's rules into the project's agent files after materialize, before exec. OFF by default = zero behavior change.skip-foreign-safe); idempotent (skip-current); no.bakchurn; fail-open (never blocks/slows launch); honors--dry-run.Tests / review
31 unit tests;
biome+tscclean. Two independent code reviews (phase 1 + phase 2): all CRITICAL/HIGH/MEDIUM findings fixed (dry-run-revert, gitignore revert, traversal guard, conformance test, marker-at-START false-positive guard). Additive only — no change to existing commands when the env gate is unset.