Reactive-Resume/docs/execution/briefs/implement-plan-09.md

Implement plan 09: user-controlled Git backup documentation

Read entire approved plan first: /Users/amruth/orca/workspaces/reactive-resume/planning-pr-3455/plans/09-external-version-backup.md. Also read current worktree AGENTS.md, referenced domain/issue instructions, relevant ADRs, /Users/amruth/.codex/RTK.md, and /Users/amruth/.agents/skills/documentation-writer/SKILL.md. Plan supplies document type, audience, goal, scope, and approved structure; do not pause for routine outline approval. Portable fallback: fetch PR #3455 and use git show a2557b2ad40e06e1e63eb655f286e6a78fe6bf0d:plans/09-external-version-backup.md.

Do not spawn subagents. Do not touch coordinator ledger or another worktree. Do not merge, mutate issues, push, or create PR.

Required execution:

• Confirm clean worktree, fetch current origin/main, rename branch codex/issue-2705-git-backup-docs, run exact drift command, fetch live #2705 body/comments/state/linked PRs, and run root intent discovery before edits.
• Revalidate current export shapes and history semantics from exact source/tests. Stop if exporter lacks required document types or synthetic restore loses content; do not broaden into runtime fixes.
• Modify only docs/guides/exporting-your-resume.mdx and docs/guides/undoing-changes-and-version-history.mdx.
• Document single-resume JSON, independent cover-letter JSON, and account archive differences; stable filenames; image URL availability; private-data/repository-visibility warning; local-only Git workflow; non-destructive import-as-new recovery; rolling in-app versions versus owner-managed Git. Include plan's exact local-only command sequence. No automatic sync, credentials, remote URL, git push, whole-account restore promise, or new product UI.
• Use only synthetic data. Run API export/version tests specified by plan. Validate single-resume import round-trip using existing synthetic fixtures/tests or a bounded disposable test; never use private data.
• Execute command sequence in mktemp -d, staging only resume.json and cover-letter.json; show changed visible field in git diff. Do not modify global Git config if identity missing; record limitation.
• Run plan's focused rg, markdown lint, git diff --check, and two-file name-only gate. Self-review every acceptance item.
• Commit with normal message. Leave branch local for independent review.

Write report .orchestration/plan-09-implementation.md: verified facts vs uncertainty, live state, drift, exact commit/files, commands/results, fixture details, skipped gates, risks, issue coverage, PR status (not created). Final response: status, commit, one-line tests, report path, concerns; at most ten lines.