[goosewobbler]

Implements Tier 2 of #594 — the comprehensive fix for stdout-scraping fragility in the Action's outputs. (Tier 1, #597, already hardened just tags via a git fallback.)

Problem

run-action.mjs derives the Action's release-mode outputs (has-changes, tags, version-output, release-output) by parsing the CLI's stdout. Any subprocess or log noise on stdout — a single stray byte — breaks JSON.parse and silently empties them. This is the same failure class that stranded the v0.41.1 action dist.

Fix — write the result to a file, read it back

• --output <path> flag on the JSON-result commands (release, gate, standing-pr update|publish), via a shared emitResult() helper: when set, the result JSON is written to that file; otherwise --json prints to stdout exactly as before.
• run-action creates a temp --output file for those modes, passes it, and reads the structured result from the file — immune to stdout noise. It falls back to captured stdout if the file is missing, and Tier 1's git-derived tags remains the final backstop.
• Preview is untouched (its markdown output legitimately uses stdout).

Now every release output comes from the file, not a stdout scrape.

Validation

• New tests: emitResult unit (file vs stdout vs no-op), and run-action (reads outputJson from the file even when the fake CLI floods stdout with noise; no --output for preview).
• pnpm typecheck 15/15; biome clean; release package + action-runner suites green (870 tests).

Note

This touches packages/release/src, so — unlike the earlier action-only PRs — it should drive a natural standing-PR release itself.

🤖 Generated with Claude Code

Greptile Summary

This PR moves structured Action results from captured stdout to temporary output files. The main changes are:

• Adds a shared helper for writing command results to a file or stdout.
• Adds --output support to release, gate, and standing-PR commands.
• Reads Action outputs from temporary files with stdout as a fallback.
• Adds unit and integration coverage for file output and noisy stdout.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the updated code.

Important Files Changed

Filename	Overview
packages/release/src/commands/emitResult.ts	Adds shared JSON result emission to an output file or stdout.
packages/release/src/commands/gate-command.ts	Adds file-based output support to the gate command.
packages/release/src/commands/release-command.ts	Adds file-based output support to the release command.
packages/release/src/commands/standing-pr-command.ts	Adds shared file-based result emission to standing-PR commands.
scripts/run-action.mjs	Captures structured command results through a temporary file and preserves stdout fallback behavior.
test/integration/action-runner.spec.ts	Covers structured file output with noisy stdout and confirms preview mode remains unchanged.

_{Reviews (2): Last reviewed commit: "fix(action): read release outputs from a..." | Re-trigger Greptile}

[github-actions]

Standing release PR: #595 · v0.41.2 queued (4 packages) · open 5h 19m · ✅ ready to merge

Release Preview — v0.41.1 → v0.41.2

Note: Labels on this PR are advisory in standing-pr mode. Bumps come from conventional commits in the standing PR; override by editing labels on the standing PR itself. Add release:immediate to bypass the standing PR and release this PR directly.

These changes will be added to the release PR (#595) when merged:

Changelog

monorepo 0.41.1 → 0.41.2

Fixed

• read release outputs from a --output file, not scraped stdout (action)

All packages → 0.41.2 (sync versioning)

• @releasekit/version
• @releasekit/notes
• @releasekit/publish
• @releasekit/release

After merge — predicted release

No version escalation — this PR's changes will be included in the queued release without affecting the projected versions.

Package	Standing PR	This PR	After merge
monorepo	0.41.2	0.41.2	0.41.2

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