feat(pdsl): refuse an auto-proceeding gate that nobody registered as safe - #223
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📝 WalkthroughWalkthroughThe PDSL validator now requires confirmation menus to appear in ChangesAuto-proceeding gate validation
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~15 minutes Change: Feature Suggested reviewers: Merge Risk: 🔵 Low · up to The corpus guard can miss an earlier duplicate menu declaration, reducing confidence that all menus are covered by the safety measurement. This is bounded to test coverage but should be corrected before relying on that invariant. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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| f"(found `{_elide(value)}`)", | ||
| hint="Declare risk statically; where it varies, emit two differently-typed gates.", | ||
| )) | ||
| if value == "confirmation" and (state.menu_name or "") not in AUTO_PROCEEDING_GATES: |
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AUTO_PROCEEDING_GATES registry keys on bare MENU name with no file/UNIT/block scoping, enabling cross-corpus authorization collisions
Severity: Major
Problem
PDSL704's gate at pdsl.py:704 checks state.menu_name not in AUTO_PROCEEDING_GATES, where AUTO_PROCEEDING_GATES (pdsl.py:176) is a frozenset of bare menu-name strings with no source-path, UNIT, or block qualifier. Duplicate-name detection (PDSL300) is scoped per fenced block via a names dict created fresh inside _validate_block (pdsl.py:475), so it never flags two same-named menus in different blocks, UNITs, or files. Registering one reviewed menu's name therefore silently authorizes any other, unrelated, unreviewed confirmation MENU anywhere in the repository (or an installed kit) that happens to share that exact bare name.
Reproduction, impact, suggested fix, verification
How to reproduce
- A reviewer registers
AUTO_PROCEEDING_GATES = frozenset({"TerminalStates"})after auditing theTerminalStatesMENU in one file. TerminalStatesis independently declared as aconfirmationgate in a second, unrelated file (already true today: cf-prompt-bug-finder.md and cf-code-bug-finder.md both declare it).- The validator runs per-source, so
_validate_blocknever sees both files together; PDSL704 only checksstate.menu_name in AUTO_PROCEEDING_GATES, which is true for both. - The second, unreviewed
confirmationMENU passes validation and auto-proceeds without ever being reviewed.
Expected behavior
Registering a menu as safe to auto-proceed should only authorize the specific, reviewed MENU declaration (scoped by file/UNIT/block), not every menu anywhere in the corpus sharing the same bare name.
Actual behavior
The registry key is a bare string compared only against state.menu_name, so authorization is granted to any MENU with a matching name regardless of which file, UNIT, or fenced block it appears in.
Reviewer audits MENU TerminalStates in file A --> registers name "TerminalStates" --> PDSL704 checks bare name only --> MENU TerminalStates in unrelated file B (never reviewed) also matches --> auto-proceeds without review
Impact
A gate that answers for the user without prompting could be silently enabled on unreviewed, potentially dangerous menus (destructive operations, credential handling, git mutation) simply because they share a name with an already-vetted menu elsewhere in the corpus — defeating the purpose of the registry, which is to require per-gate human review.
Suggested correction
Scope the registry key to something that uniquely identifies the declaration (e.g. a (source_path, menu_name) or (source_path, UNIT, menu_name) tuple) rather than a bare name, or otherwise plumb a stable per-declaration identity into the validator; the corpus-scanning tests should remain as defense-in-depth but not substitute for a structurally collision-proof key.
How to verify
Add a test with two distinct fenced blocks/files declaring the same MENU name as confirmation, register only one as reviewed, and confirm the unreviewed one still reports PDSL704 rather than silently passing.
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Correct, and the collision is present in this tree rather than hypothetical: TerminalStates is defined in both cf-prompt-bug-finder.md and cf-code-bug-finder.md. Registering that name would authorise a definition nobody reviewed.
I have not scoped the key, and I want to be straight about why. The validator sees one source at a time, has no project root, and PdslSource.source is a path that differs between this repository and an installed kit — so a file-scoped key would be plumbing invented for the occasion, and wrong in one of the two contexts.
What I did instead:
- a test that scans the tree for any menu name defined in more than one file and refuses to let such a name be registered — which fires today if
TerminalStatesis added; - a test that proves the limitation as behaviour: one registry entry clears the same bare name in two different sources. That makes the tripwire load-bearing rather than decorative, and leaves the constraint discoverable instead of buried in a comment;
- the limitation written into the registry's own docstring, naming
TerminalStatesas the live example.
If you would rather have real scoping, the honest prerequisite is giving the validator a project root, which is a larger change than this rule — say so and I will raise it separately rather than smuggle it in here.
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Re-verified against the current code (a81d2aa) and this is still an issue. The write-up has also been updated to reflect the current code (see the edited comment above).
Why
- Reviewer: PDSL704 authorizes by bare name, and the new collision tripwire only detects names spanning multiple files, leaving same-source multi-block collisions unguarded.
- Verifier: Confirmed by direct code read:
names(PDSL300 duplicate map) is created fresh per call to_validate_block(pdsl.py:475), scoped per fenced block, while PDSL704 (pdsl.py:704) compares only the barestate.menu_nameagainst the global module-levelAUTO_PROCEEDING_GATESfrozenset with no source/UNIT/block qualifier. Grepping the corpus confirms this is not hypothetical:MENU TerminalStatesis independently declared in both skills/studio/agents/cf-prompt-bug-finder.md:181 and skills/studio/agents/cf-code-bug-finder.md:166. Registering either as safe would silently authorize the other, unreviewed one. The author's own reply concedes this directly, and while a new corpus-scanning test partially compensates (refusing to register an already-duplicated name and proving the collision as behavior), it is a test-time tripwire tied to this repository's own tree layout, not a structural fix to the shipped mechanism.
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Re-verified against the current code -- this write-up has been updated.
Why
Problem (was): PDSL704's gate at pdsl.py:704 checks state.menu_name not in AUTO_PROCEEDING_GATES where AUTO_PROCEEDING_GATES is a frozenset of bare strings with no source-path, UNIT, or block qualifier. Duplicate-name detection (PDSL300) is scoped per fenced block via a names dict created fresh in _validate_block (line 475), so it never flags two same-named menus in different blocks, UNITs, or files. Registering one reviewed menu's name therefore silently authorizes any other, unrelated, unreviewed confirmation MENU anywhere in the repository (or an installed kit) that happens to share that bare name. This is not hypothetical: MENU TerminalStates is independently declared in both skills/studio/agents/cf-prompt-bug-finder.md:181 and skills/studio/agents/cf-code-bug-finder.md:166 today.
Problem (now): PDSL704's gate at pdsl.py:704 checks state.menu_name not in AUTO_PROCEEDING_GATES, where AUTO_PROCEEDING_GATES (pdsl.py:176) is a frozenset of bare menu-name strings with no source-path, UNIT, or block qualifier. Duplicate-name detection (PDSL300) is scoped per fenced block via a names dict created fresh inside _validate_block (pdsl.py:475), so it never flags two same-named menus in different blocks, UNITs, or files. Registering one reviewed menu's name therefore silently authorizes any other, unrelated, unreviewed confirmation MENU anywhere in the repository (or an installed kit) that happens to share that exact bare name.
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Inline comments:
In `@tests/test_pdsl_keywords.py`:
- Line 1185: Update the menu collection in the corpus measurement so duplicate
MENU declarations are retained instead of overwritten by name. Replace the
name-keyed assignment near the duplicate-name guard with a list or a key that
includes source and occurrence, and ensure the subsequent vocabulary-matching
assertion evaluates every collected declaration.
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architecture/features/pdsl-validation-cli.mdskills/studio/scripts/studio/utils/pdsl.pytests/test_pdsl_keywords.pytests/test_pdsl_validate_cli.py
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…safe `confirmation` is the one gate type that answers for the user, so it is the one whose mislabelling can resolve a question they never saw. The blocked-action invariants say which gates must never auto-answer, and they say it in categories — destructive operations, credentials, git mutation, unknown blast radius — because deciding whether a given gate is one of those is a judgement. Enforcing those categories mechanically was measured before being attempted, and it does not work: matching them by their own vocabulary refuses all 105 menus in the corpus, which would disable the type rather than guard it. So the check is inverted. Rather than detecting danger, a small registry names the gates a person has reviewed and accepted as safe to auto-proceed, and a `confirmation` declaration on anything else is an error. That is a claim this can keep: it asks whether the gate is registered, never whether it is dangerous. Forgetting to register fails closed — the gate keeps asking, which is today's behaviour — and adding an entry is a deliberate, diffable act that shows a reviewer every gate able to answer for a user, in one place. The registry ships empty: no gate is typed yet, and a test pins that so the first entry arrives with a reviewer noticing. A second test reads the shipped invariant list rather than a copy, and refuses to let any gate named there be registered. Signed-off-by: Sanjeev Solanki <[email protected]>
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| declarations = [] | ||
| for folder in ("workflows", "skills"): | ||
| for path in Path(folder).rglob("*.md"): | ||
| body = path.read_text(encoding="utf-8-sig", errors="replace") |
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New corpus-scanning tests reintroduce unguarded read_text() in a file where this exact crash was already flagged and fixed once
Severity: Minor
Problem
tests/test_pdsl_keywords.py already has an established pattern for scanning many repo files safely: collect paths (e.g. via rglob) then read each through pdsl.read_source_file(path), which converts OSError/UnicodeDecodeError into a (None, PdslError) tuple instead of raising (skills/studio/scripts/studio/utils/pdsl.py:257-260, used at test_pdsl_keywords.py:938, 1057, 1390). That guard exists in this exact file specifically because of a prior confirmed finding, pr-163/: 'The new test directly calls path.read_text(encoding="utf-8") for each configured path without catching OSError or UnicodeDecodeError. An unreadable or malformed path produces an unhandled test crash instead of the clear per-item assertion result required by this check.' The new tests added in this diff (TestOnlyARegisteredGateMayAnswerForTheUser::test_the_measurement_that_justified_the_inversion_still_holds, test_a_registered_name_that_no_longer_exists_is_caught, test_no_name_defined_in_two_files_is_ever_registered, test_no_gate_the_invariants_name_is_ever_registered) reintroduce the identical bypassed pattern: raw path.read_text(encoding="utf-8-sig", errors="replace") inside three separate for path in Path(folder).rglob("*.md") loops over workflows/ and skills/ (lines 1187, 1214, 1257), plus two direct single-file reads with no error handling at all, not even errors="replace" (line 1174 and the mirrored test_pdsl_validate_cli.py addition at line ~844). errors="replace" only neutralizes UnicodeDecodeError for the loop cases; none of the five new call sites catch OSError, so a permission-denied or transiently-missing file during the corpus walk raises an unhandled exception during collection instead of the clear, attributable per-item message this same module and this same file already guarantee elsewhere for exactly this class of failure.
Reproduction, impact, suggested fix, verification
How to reproduce
- On a checkout of this branch, make one file under workflows/ or skills/ unreadable (e.g. chmod 000) or simulate a transient OSError via a monkeypatch on Path.read_text. 2. Run pytest tests/test_pdsl_keywords.py -k test_a_registered_name_that_no_longer_exists_is_caught (or either of its two siblings, or test_the_measurement_that_justified_the_inversion_still_holds). 3. Observe the test aborts with an unhandled PermissionError/OSError traceback rather than a clear message identifying the offending path.
Expected behavior
A single unreadable/permission-denied file during the corpus scan should be surfaced as a clear, attributable per-file error (as the sibling tests using pdsl.read_source_file already do), not crash the whole test with a raw OSError traceback.
Actual behavior
path.read_text(...) is called directly inside the rglob loops (and in two standalone single-file reads) with no try/except for OSError, so any filesystem failure on any one of the scanned files propagates uncaught out of the test.
rglob(*.md) --> for each path: path.read_text(...) [no try/except] --> OSError on one bad file --> uncaught exception --> whole test aborts (vs. read_source_file() which returns (None, PdslError) per path)
Impact
Low likelihood in a clean CI checkout, but when a permission or transient filesystem issue does occur, the corpus-scan tests fail with a confusing crash instead of the clear, per-item diagnostic this exact test file was already corrected to provide once before (pr-163/), reintroducing the same class of gap in the same file.
Suggested correction
Route these new scans through the existing pdsl.read_source_file(path) helper (skip/record the path on error) the same way test_the_runtime_judgement_paths_named_in_the_baseline_comment_still_exist and the PROMPT_ROOTS-based tests in this file already do, instead of calling path.read_text() directly.
How to verify
Re-run the reproduction step above after the fix: an unreadable file should produce a clear per-file failure message (or be skipped/reported) rather than an unhandled OSError traceback.
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Changes requested: a major issue in the new auto-proceeding gate registry needs to be resolved before this lands.
AUTO_PROCEEDING_GATESkeys on bare menu name only, with no file/UNIT/block scoping —PDSL704's gate atpdsl.py:704checks membership againstAUTO_PROCEEDING_GATES(a frozenset of bare name strings atpdsl.py:176), but the validator processes one source at a time and has no notion of file, UNIT, or block identity for that check. Duplicate-name detection (PDSL300) only dedupes within a single fenced block, so it won't catch two unrelatedconfirmationMENUs sharing a name across different blocks, UNITs, or files. As written, registering one reviewed menu's name silently authorizes any other same-namedconfirmationMENU anywhere in the repo or an installed kit, whether or not it was ever reviewed — which defeats the purpose of the registry. This needs file/UNIT-qualified keys (or an equivalent scoping mechanism) before the gate can be trusted. (discussion)
| # keying by name silently dropped one of them and measured the survivor twice | ||
| # over. Raised in review — and it is precisely what the duplicate-name tripwire | ||
| # beside this test exists to catch, written into the measurement itself. | ||
| declarations = [] |
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Three new corpus-scanning tests each re-walk and re-read the entire workflows/skills tree with no shared fixture or ceiling guard
Severity: Minor
Problem
test_the_measurement_that_justified_the_inversion_still_holds, test_a_registered_name_that_no_longer_exists_is_caught, and test_no_name_defined_in_two_files_is_ever_registered each independently perform their own Path(folder).rglob('*.md') over ('workflows', 'skills') and read every matched file's full text. There is no shared fixture or caching between them (tripling the I/O cost of the same scan), and unlike this suite's own AUTHORED_CORPUS_CEILING convention, none asserts an upper bound on corpus size, so unbounded corpus growth is never surfaced to a reviewer as a deliberate event.
Reproduction, impact, suggested fix, verification
How to reproduce
- Open tests/test_pdsl_keywords.py. 2. Note test_the_measurement_that_justified_the_inversion_still_holds (~line 1154), test_a_registered_name_that_no_longer_exists_is_caught (~line 1202), and test_no_name_defined_in_two_files_is_ever_registered (~line 1241). 3. Each independently loops over the same two directory trees and reads every.md file's contents. 4. Run the test file and observe three separate full-tree scans execute on every test run with no caching.
Expected behavior
A single shared fixture (e.g. module- or session-scoped) collects the menu declarations once, reused by all three tests, and/or an explicit ceiling assertion (mirroring AUTHORED_CORPUS_CEILING) bounds the number of files/declarations scanned so growth is a visible, deliberate event.
Actual behavior
Each test re-walks and re-reads the full workflows/ and skills/ trees independently, with only lower-bound sanity assertions (>50), so cost triples versus a shared-scan design and corpus growth is never flagged.
test A --rglob+read--> workflows/,skills/ (full read)
test B --rglob+read--> workflows/,skills/ (full read, again)
test C --rglob+read--> workflows/,skills/ (full read, again)
=> 3x redundant I/O, no ceiling to catch growth
Impact
Test suite runtime/I/O cost silently scales with corpus size and is tripled versus a shared-scan design; unlike the sibling AUTHORED_CORPUS_CEILING convention, unbounded growth of the scanned corpus is never surfaced to a reviewer as a deliberate, visible event.
Suggested correction
Extract the shared rglob+read scan into a session/module-scoped pytest fixture (or a cached helper) that all three tests consume, and add an assertion bounding the number of scanned files/declarations against a named ceiling constant, following the AUTHORED_CORPUS_CEILING pattern already used elsewhere in this suite.
How to verify
Re-run the affected tests and confirm the directory tree is walked/read once rather than three times (e.g. via a monkeypatched counter on Path.rglob), and that a documented ceiling constant exists and would fail loudly if the corpus grows past it.
2 participants
Part of #219.
confirmationis the one gate type that answers for the user, so it is the one whose mislabelling resolves a question they never saw. Nothing checked it.Reproduced before writing anything: adding
TYPE: confirmationtoMENU ReviewFindingsNavigation— a gate named in the never-auto-answer invariants atskills/studio/modules/brave-new-world-eligibility.md:33-43— passescfs validatewith 0 errors. The lint from #153 checks the vocabulary: that the token is one of the three, and that a near-miss spelling is rejected. That is what it was built for and it does it.The obvious design was measured, and it does not work
Enforcing the blocked-action invariants mechanically means matching their categories — destructive operations, credentials, git mutation, external delegation, unknown blast radius. Matching those by their own vocabulary refuses all 105 menus in the corpus.
A lint built that way does not guard the type; it removes it. Measuring first is the only reason that is not what this PR contains.
So the check is inverted
Rather than detecting danger, a registry names the gates a person has reviewed and accepted as safe to auto-proceed. A
confirmationdeclaration on anything else isPDSL704, inside the existingPDSL700gate-risk band.The distinction is the point: this asks is this registered, which it can answer, rather than is this dangerous, which it cannot. The judgement stays where the ADR puts it — with a person, at author time, where it is reviewable — and the lint enforces only that the judgement was actually made.
It fails closed. An unregistered gate keeps asking, which is today's behaviour, so forgetting to register is safe. And every gate able to answer for a user is visible in one place, which a diff spread across kit modules is not.
What ships
PDSL704andAUTO_PROCEEDING_GATES, the registry shipping empty — no gate is typed yetWhat this does not do, stated rather than implied
It does not enforce the blocked-action list. Only two menus are named outright in those invariants —
ReviewFindingsNavigationandReviewFixScope— and only those two are mechanically barred from the registry. The rest are categories a lint cannot decide.I am explicit about this because I got it wrong once already in this story: I wrote elsewhere that the lint "should already refuse anything weaker" on blocked-list gates, which reads as a description of what exists and was not one. Corrected in #219.
One existing test changed, and why
test_gate_type_accepts_each_declared_risk_in_both_menu_shapesasserted all three types validate cleanly. That is a vocabulary test, and the new rule madeconfirmationfail for a reason the test is not about — so it registers its fixture gate for the duration, and a new sibling asserts the unregistered case. The pair now reads: the token is understood, and understanding it is not the same as permitting it.Verification
Four mutations, each caught: the rule removed, the registry consulted with the wrong sense, the rule fired on
decision/blockingas well, and a blocked-list gate pre-registered.Gates run locally on this branch, off
mainat916dee7:cfs validatePASS (0 errors, 0 warnings, 242/242);make test6173 passed; spec-coverage 90.9% coverage, 0.4601 granularity; pylint, vulture-ci, test-coverage, test-gates, self-check, check-versions and validate-kits clean.make cicannot pass on this repo for anyone (#197), so the evidence above is CI's own targets, run individually.Why now
The next task types the ten most-reachable gates. Doing that by hand with nothing enforcing the
confirmationcase means one wrong label is a gate that later auto-answers a deletion or credential prompt, with nothing between the label and the behaviour. This lands first; the labels go behind it.Summary by CodeRabbit