fix(guard): read gh api calls as argv; document renaming release titles - #155
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📝 WalkthroughWalkthroughThe release recovery reference adds guidance for detecting and correcting titles that differ from release tags. The GitHub release guard now parses shell-style arguments to identify mutating release API calls. Self-tests add coverage for release API argument forms and tag invocation boundaries. Priority: ➖ Normal Change: Bug fix Merge Risk: 🟡 Moderate · up to Commands with ordinary assignment prefixes can bypass the release and tag safeguards. Fix the shared parser before merging unless that risk is explicitly accepted. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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In `@skills/github-release/scripts/_invocations.py`:
- Line 50: Update INVOCATION_PREFIX so environment assignments can include
quoted or escaped blanks without ending the assignment match early. Preserve the
existing handling of unquoted values and ensure both invocation guards recognize
commands following these assignments.
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skills/github-release/references/recovery-procedures.mdskills/github-release/scripts/_invocations.pyskills/github-release/scripts/guard-gh-release.pyskills/github-release/scripts/tests/guard-gh-release-invocations.test.shskills/github-release/scripts/tests/guard-tag-invocations.test.sh
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Add a recovery section for releases titled "<Project> vX.Y.Z" instead of the bare tag. guard-gh-release.py blocks every title change for the agent, `gh release edit --title` and PATCH on the releases API alike, with no override, so the section describes handing the maintainer a script: dry run by default, rename only exact matches on --apply, read each title back, and a final check that no title differs from its tag. Measured on CybotTM/wow-quickroute on 2026-09-23: 20 releases renamed this way, all read back without a failure. Both jq filters checked on sample data: an exact "<Project> <tag>" title is listed, a bare tag or a title with a suffix is not. Assisted-by: claude-code:claude-opus-5-5 Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W Agent-Host: 0493f0 Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
From a review of this branch. The path pattern for `gh api` required the endpoint to start right after the flags, so a quoted path, which is how a script with variables writes it (`"repos/$R/releases/$ID"`), skipped the check entirely: `gh api -X PATCH "repos/o/r/releases/1" -f name=v1` returned 0. The same held for a single-quoted path, `--method=PATCH` before a quoted path, and a quoted method (`-X "DELETE"`). The path may now carry an optional quote, flags may take their value after `=`, and the method may be quoted. Five new cases pin the blocking forms; each failed before the change. A quoted read-only call (`--paginate --jq`) stays allowed. All eight script suites pass. The recovery section added on this branch also changes: - the dry-run step no longer says the guard allows it because it only reads: the guard sees only the script call, so leaving `--apply` to the maintainer is the agent's part, not something the guard enforces; - "20 releases" reads "20 of 30 releases carried the prefixed title"; - the final check notes that a release with an empty name shows up too. Assisted-by: claude-code:claude-opus-5-5 Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W Agent-Host: 0493f0 Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
From the second review of this branch. The two regexes that judged a
`gh api` call had more ways through than the quoted path fixed in the
previous commit: a flag value with a space in it (`-f body="new notes"`)
ended the flag list before the endpoint, `--raw-field` and `--field=x`
were not recognised as data flags, and a full URL was not an endpoint.
They also produced false positives: `-X GET` with query fields, jq text
mentioning "-X POST", a repository named like `releases-app`. And the
flags group backtracked exponentially: twenty dash-words took over 20 s
against a 2-second hook timeout.
The call is now split with shlex, the way the shell hands it to gh.
Flags that take a value (from `gh api --help`, gh 2.101.0) consume it,
in attached forms too. A word containing repos/<o>/<r>/releases is a
release endpoint, bare, quoted or as a URL. A call mutates on an
explicit POST, PUT, PATCH or DELETE, on a method the guard cannot read
("$M"), or on data flags without GET or HEAD. An unbalanced quote around
a release path blocks rather than guesses.
Tests: 14 new cases. Against the previous guard, 10 of them fail: the
three gaps, the full URL, the method from a variable, and the three
false positives. All eight script suites pass. 200 dash-words now take
about 15 ms.
A command wrapped in `bash -c` or fed to a shell through a heredoc is
still unseen by every check of the guard; that is issue #157. The
recovery section now says the guard's silence there is no permission.
Assisted-by: claude-code:claude-opus-5-5
Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W
Agent-Host: 0493f0
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
…ps, {owner}
From the third review of this branch, which found a regression in the
previous commit and three older gaps in the same check.
- The release path pattern required owner and repository as two path
segments, so `gh api -X PATCH "repos/$R/releases/$ID"` passed: the very
command the recovery section prints. The previous regex caught it.
Owner and repository may now sit in one segment. A repository literally
named "releases" is read as a release path too, which errs toward
blocking.
- shlex with comments=True treated a "#" inside a word as a comment,
which bash does not: `-H X-A:a#b -X DELETE` lost its method. comments is
dropped; a real trailing comment can only make the guard stricter.
- Shorthand groups are read as pflag reads them: boolean letters are
skipped and the first letter that takes a value ends the group, so
`-iX DELETE`, `-iXDELETE` and `-if tag_name=v1` are seen.
- The shared splitter cut at every "{" and "}", so `repos/{owner}/{repo}`,
the form gh documents, never reached the check. A brace now separates
only as a word of its own, as the shell's reserved word does; the brace
group test of the tag guard still passes.
Tests: 11 new cases, the recovery-doc command among them verbatim. Against
the previous commit, all 10 new blocking cases fail. All eight script
suites pass; ruff is clean.
Assisted-by: claude-code:claude-opus-5-5
Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W
Agent-Host: 0493f0
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
…d; }
From the fourth review of this branch, which found three regressions in
the previous commit and one older gap.
- Dropping comments=True kept a trailing comment's words, and the method
is read last-wins: `-X DELETE # -X GET` passed, and a release path
inside a comment blocked an unrelated POST. The arguments are now cut
at the first unquoted "#" that begins a word, before shlex splits them.
A "#" inside a word stays part of it.
- Braces inside a word no longer split, and the assignment pattern in
INVOCATION_PREFIX stopped at the blank in `a=${X:-foo bar}`, so the
command after it was not seen by either guard. The value may now hold
${...}; the alternatives do not overlap, so it cannot backtrack.
- bash 5.3's `${ cmd; }` command substitution was no longer split: "${"
followed by a blank now separates.
- The numeric route `repositories/<id>/releases` is a release path.
- A method flag with no value no longer reads as an allowed method.
Tests: seven new cases in the gh-release suite and six in the tag suite.
Against the previous commit, all ten new blocking cases fail; the
control case (braces inside words) passes on both. All eight script
suites pass; ruff is clean.
Assisted-by: claude-code:claude-opus-5-5
Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W
Agent-Host: 0493f0
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
From the fifth review of this branch. The comment cutter added in the
previous commit is a text scan, and it read a "#" as a comment where bash
does not: inside `${V/ #/}`, and after a `$'...'` string with an escaped
quote, which shifted its quote tracking. Either way it cut off a real
`-X DELETE`, and the call passed as a GET.
A gh api call is now judged twice, with and without the cut, and blocks
if either reading does. Cutting is still needed, because kept, a
comment's words override the real method (`-X DELETE # -X GET`); judging
the uncut text as well means a mistake in the cutter can only block. The
cost: a release path or method that appears only in a comment blocks
again, as it did before the cutter; that test's expectation changes
from 0 to 2, with the reason next to it.
Tests: the two reviewer commands. Against the previous commit, both and
the changed case fail. Keeping only the cut reading fails the three;
keeping only the uncut reading fails the two `# -X GET` cases. All
eight script suites pass; ruff and shellcheck are clean.
Assisted-by: claude-code:claude-opus-5-5
Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W
Agent-Host: 0493f0
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
From the sixth review of this branch, which found no command blocked
before and allowed now (115 fixed cases, 750,000 random inputs). It
noted that a release read with an apostrophe in its trailing comment
("# don't mutate") is now blocked: the uncut reading sees an unclosed
quote. The reviewer's narrowing of that was measured to reopen a
2 -> 0 path in a variant, so the block stays and the docstring says so.
Comment only.
Assisted-by: claude-code:claude-opus-5-5
Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W
Agent-Host: 0493f0
Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
An assignment before the command ended at the first blank, so a value with a quoted or escaped blank hid the command from both guards: A="x y" gh release create v1.2.3, A='x y' ..., A=x\ y ... and the same before git tag were all allowed. The value may now hold a double-quoted span, a single-quoted span and an escaped character. Each alternative starts with a different character, so the pattern stays linear. Found by CodeRabbit on this branch. The seven new blocking cases fail against the previous prefix; one allowed case per suite pins that a harmless command after such a prefix still passes. Assisted-by: claude-code:claude-opus-5-5 Agent-Session: https://claude.ai/code/session_01Ajsba9TsThQzrPKu1RxL5W Agent-Host: 0493f0 Signed-off-by: Sebastian Mendel <info@sebastianmendel.de>
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Merging this makes
guard-gh-release.pyread agh apicall the way the shell hands it to gh, so a mutating call on a release endpoint is blocked in every form. The old check passed quoted paths, flag values with blanks, long data flags and full URLs, and one of its regexes backtracked exponentially. The PR also adds a recovery section on renaming release titles that differ from the tag.Changes
scripts/guard-gh-release.py, check forgh apion a release endpoint:shlexand read as argv. Flags that take a value, fromgh api --help(gh 2.101.0), consume it: separate, attached, after=, and inside shorthand groups such as-iXDELETE. Parsing is linear; 2000 dash-words take about 15 ms, where 20 used to take over 20 s.repos/<owner>/<repo>/releases,repos/$R/releases(owner and repo in one segment) orrepositories/<id>/releases, bare, quoted or as a URL."$M", empty); or data flags without GET or HEAD.-X DELETE # -X GETis blocked, and a mistake in the comment cutter can only block. The price: a release path or method only in a comment, or an apostrophe in such a comment, blocks too.scripts/_invocations.py, the splitter both guards share:repos/{owner}/{repo}and${VAR}stay intact.${ cmd; }(bash 5.3) separates.${…}, a quoted span or an escaped character with blanks (a=${X:-foo bar} git tag v1,A="x y" gh release create v1).Tests:
guard-gh-release-invocations.test.shfrom 57 to 102 cases, andguard-tag-invocations.test.shfrom 74 to 83.references/recovery-procedures.md, new section "Release Titles Differ From the Tag", in the file's Symptom / Cause / Prevention / Recovery form:--title "$TAG"in the release workflow.--apply, reads each title back, and ends with a check that no title differs from its tag. The maintainer runs it with the!prefix. The section says the guard reads only the command it is shown.Not in this PR, filed:
bash -c "…"and a heredoc fed to a shell escape every check.\gh,"git",/usr/bin/gh) is not recognised.shlexmisreads ANSI-C quoting$'…'.Testing done
*.test.shsuites pass, which is whatscript-tests.ymlruns.ruff check,ruff format --checkandshellcheckare clean.markdownlint-cli2on the recovery file: no findings.CybotTM/wow-quickrouteon 2026-09-23: 20 of 30 releases carried the prefix and were renamed and read back, 0 failures.Assisted by claude-code:claude-opus-5-5 — Session