Defame1297
2bde9a6a82
Raise the PATCH version of each skill whose references/sources.md, references, or validator changed in the Research registry migration, as ADR-0022 requires. factory-audit and skill-author changed behaviour and docs; the rest changed provenance metadata only. Refs: #121 ADR: 0022 Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01EGHFJextYtVQseaHPDDhxB
67 lines
3.5 KiB
Markdown
67 lines
3.5 KiB
Markdown
---
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name: git-history
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description: >
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Use when investigating git history — pickaxe (`-S`/`-G`) or `-L` line-range log
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queries, tracing when a change landed, bisecting what broke something, or
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locating a commit to revert or backport. Not authoring or rebasing commits ->
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`git-commits`. Not a Gitea server's history -> `gitea-branches`.
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metadata:
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version: "1.0.3"
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category: git
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source_keys:
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- git-scm-bisect-docs
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- git-scm-log-docs
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- git-scm-diff-docs
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allowed-tools: Bash
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---
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## Gotchas
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- `-S"string"` matches only where the string's *count* changed, so a line edited in place matches `-G"regex"` and not `-S`. Reach for `-G` whenever the string may have moved rather than appeared.
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- `--follow` traces renames for exactly one path. Given several paths or a glob it fails instead of degrading, so run it once per file.
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- Under `git bisect run`, exit `128` or above **aborts the session** rather than marking the commit bad, so a crashing test script ends the search silently.
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- Bisect answering "cannot find exact culprit" beside skipped commits is a complete result: it is as precise as the skip range allows.
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## Step 1 — Pick the entry procedure
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| What is known | Procedure |
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|---|---|
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| Content, a file, or a line range to search for | Query the log — Step 2 |
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| Nothing to search for — only that the behaviour changed between two points | Bisect — read `references/bisect.md` |
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| The commit itself, already identified | Step 3 |
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## Step 2 — Query the log
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Default to `rtk git log --oneline`, then narrow by whatever is known:
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- **Content**: `rtk git log -S"string"`, or `-G"regex"` to match any diff line. `--pickaxe-regex` makes the `-S` argument a POSIX ERE; `--pickaxe-all` shows every file in a matching changeset.
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- **A line or function**: `git log -L <start>,<end>:<file>` or `git log -L :<function>:<file>` — bare, not `rtk`: rtk truncates each diff line at ~72 characters. Confirm the range resolves before reporting on it — an off-by-one silently omits the target.
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- **A file across renames**: `rtk git log --follow -- <file>`. Without `--follow` the history stops at the rename boundary.
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- **Mainline only**: `--first-parent` follows the integration branch and skips commits merged in from side branches.
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- **Structured output**: `rtk git log --format="%h | %s | %an (%ar)"`.
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If you need the placeholder catalogue, format presets, `--diff-filter` letters, full `-L` syntax, ancestry filters, pickaxe binary-file behaviour, or `git diff` output-control flags such as `--stat`, `--word-diff` and the whitespace options, read `references/git-log-format.md`.
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## Step 3 — Act on a located commit
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Offer the operation and its consequence; run it only once the user has chosen.
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- Backporting the commit to another branch is a cherry-pick, and cherry-pick is `git-commits`' — it owns the destination-branch check, the `rtk git` wrapper and the `--abort` path. Hand it the SHA; do not run `git cherry-pick` from here.
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- `rtk git revert <commit>` adds a new commit undoing it — for un-applying merged work without rewriting history.
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- `rtk git blame <file>` attributes each line to the commit that last touched it, when the question is which commit introduced one specific line.
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For diff output control on the located commit, read `references/git-log-format.md`.
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## Step 4 — Return the result
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Report each located commit in this shape, so a calling agent can act on it without reparsing raw log output:
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```text
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<sha> — <subject>
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<author> (<relative date>)
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Recommendation: <action or "none">
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```
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