Pre Release Review

Pre-release Review

Use this skill to run a read-only production release readiness review. The goal is to reduce release time and coordination failures by finding missing deploy materials, unsafe ordering, configuration gaps, data migration gaps, and ambiguous production risks before CI/CD or manual release steps begin.

When to Use This Skill

• Use when the user asks for a release audit, pre-release review, go-live review, or deploy readiness check.
• Use before publishing a tag, deploying production services, or merging a release branch.
• Use when a PR or git range may include migrations, environment changes, queues, cache behavior, object storage assets, or service contract changes.
• Use when the user asks whether a change is safe to ship and needs a read-only risk report.

Non-negotiable rules

• Do not modify source code, configs, migrations, secrets, deployment files, or generated files.
• Do not execute migrations, clear or warm caches, upload assets, trigger CI/CD, deploy services, publish tags, rotate secrets, or change remote infrastructure.
• Produce a concise report that lists only confirmed problems and plausible risks needing confirmation. Do not bury the reader in clean checklist items.
• Sort findings from highest to lowest priority.
• Include module, finding, evidence, inferred owner, risk, and recommended action for each item.
• Never reveal private keys, account passwords, tokens, certificates, cookies, or full secret values. Report only file path, line number, variable name, secret type, and a redacted hint.
• If evidence is incomplete but the risk could block production, list it as a confirmation item.

Required references

• Read references/checklist.md before analyzing findings so important release domains are not skipped.
• Read references/report-template.md before writing the final report so priorities, owner inference, secret redaction, and output shape stay consistent.

Project guidance discovery

Before interpreting the release diff, look for project-local guidance files such as AGENTS.md and CLAUDE.md in the repository root and relevant service directories. Read them when present so the review respects the user's project-specific conventions, service boundaries, release rules, validation expectations, ownership hints, and known operational constraints.

• Treat project guidance as context for how to interpret risks, not as permission to perform mutating release actions.
• If project guidance conflicts with this skill's non-negotiable safety rules, the read-only, no-secret-disclosure rules in this skill win.
• If a relevant guidance file cannot be read, note the limitation in "Unable To Verify" only when it affects the release review.

Scope selection

Determine the review range before judging risk. State the chosen range in the report.

1. If the user provides a pull request URL or PR number, review that PR diff first.
   • If gh is available and authenticated, use read-only commands such as gh pr view and gh pr diff.
   • If the PR cannot be fetched due to missing tooling, auth, or network limits, say so and ask for a local branch, patch, or explicit git range. Do not invent the PR contents.
2. If the user provides an explicit base..head range, use it directly.
3. If the user provides only a head commit, compare the previous usable release tag reachable from that commit to the head commit.
4. If the user provides no scope, compare the previous usable release tag to HEAD.
5. Choose the previous usable release tag carefully:
   • Prefer the repository's visible release-tag convention when one is obvious, such as semantic versions, v*, or release-*. If tag naming is mixed, state the assumption.
   • If HEAD is exactly at one or more tags, treat those as the current release point and compare against the earlier reachable release tag, not HEAD's own tag.
   • If no usable previous release tag exists, review the latest 5 commits and explicitly warn that this is a fallback: there is no usable previous release tag, so the audit only covers the latest 5 commits; recommend a PR or tag-based range for future reviews.

Read-only evidence collection

Run only safe inspection commands, adjusted to the repository and current permissions. Useful commands include:

git status --short
git rev-parse --show-toplevel
git rev-parse --abbrev-ref HEAD
git rev-parse HEAD
rg --files -g 'AGENTS.md' -g 'CLAUDE.md'
git tag --merged HEAD --sort=-creatordate
git tag --points-at HEAD
git for-each-ref --sort=-creatordate --format="%(refname:short) %(objectname:short)" refs/tags
git describe --tags --abbrev=0 HEAD
git diff --name-status <base>..<head>
git diff --stat <base>..<head>
git log --oneline --decorate --no-merges <base>..<head>
git diff -U3 <base>..<head> -- <path>
git blame -L <start>,<end> -- <path>
git log --format="%h %an %s" -- <path>
rg -n "<pattern>" .

For PRs, use gh pr view and gh pr diff only when they are available and allowed. Do not bypass network, auth, sandbox, or approval restrictions. If a command cannot run, record the limitation in the report's "Unable to verify" section.

Review workflow

1. Confirm the git repository root, current branch, dirty state, and selected comparison range.
2. Collect changed file names, file status, diff stats, commit summaries, and touched services.
3. Inspect relevant diffs rather than relying on filenames alone.
4. Use the checklist to map changed code to production requirements:
   • schema changes to migrations, indexes, seeds, and backfills
   • config reads to env examples, deploy secrets, flags, and runtime config
   • cache key or TTL changes to invalidation, prewarm, and compatibility work
   • queue producers/consumers to topic setup, DLQ, idempotency, and deploy order
   • asset references to object storage, CDN, templates, certificates, and permissions
   • service contract changes to deploy sequence, backward compatibility, and rollback risk
5. Infer owners with git blame on changed lines when possible; otherwise use recent git log authors for the file or commit. Label them as inferred owners, and do not include email addresses.
6. Classify each finding as P0, P1, or P2 using references/report-template.md.
7. Write the final report in the user's language when practical. Keep conclusion values exactly as BLOCKED, NEEDS_CONFIRMATION, or NO_BLOCKER_FOUND.