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Session Handoff [auto-1634]: Narrow Nested timeout Handling per #2056 #2072
Description
Activity
Parked: waiting on decision #2079
Done this round. #2056's option 1 is applied, and
feature/auto-1634is pushed at 271a763. All commits are signed and no pull request is open. The worktree at/home/pieter/repos/worktrees/ProjectTemplate-auto-1634is still standing on that branch and is clean.- 64fa53b merges
origin/develop(b56efb2) with no conflicts. - 09caea6 narrows nesting. A nested
timeoutchain is bounded only when every outer one sends signal 0 with no kill-after and the innermost one is a bound. Every other nesting is denied, and requirement 7 declares those denies. A variable-svalue is no bound.nohupwithHUPis declared. - a1b186c is fix round 1, answering pass 1. A
timeoutbehind an argument-taking prefix now counts as nesting, and a false test label is corrected. - 271a763 is fix round 2, answering pass 2. An outer
-kis denied in any spelling, and a brace or glob-svalue is read as no bound. --selftestpasses. Each new row was mutation-checked by reverting its logic. The local gates are clean: ruff,prose_lint.py --diff origin/develop,repo_gate.py --check eol,spec/validate.py, anddocker_lint.py.
Local strict review. Three passes were recorded, the last on 271a763, whose receipt covers the pushed head.
- Pass 1: 2
introducedfindings, fixed in a1b186c. 2pre-existingfindings, one already filed as Stop an Inherited timeout Bound From Reaching a Loop Under a Nested timeout #2055 and one filed as Read a --foreground timeout as Signalling Only Its Direct Child #2078. - Pass 2: 3
introducedfindings, fixed in 271a763. - Pass 3: 4
introducedfindings, still open. Both edit rounds for this push are spent, so Choose How to Finish #1634's Lane After the Narrowed Model's Strict Passes #2079 lists the findings and gives the options.
Remaining.
- Apply the option Choose How to Finish #1634's Lane After the Narrowed Model's Strict Passes #2079's answer picks.
- Open the pull request to develop with
Closes on promotion: #1634, drive it, and close this lane out.
Follow-ups still unfiled, carried over from round 2:
- The check could also deny
CONT,CHLD,URG,WINCH, and the stop signals on a singletimeout. - uutils
timeoutmay read some spellings as signal 0, and the check models GNU only. This needs a probe on a uutils host before anyone acts on it.
No lesson issue filed.
- 64fa53b merges
Parked: waiting on decision #2118
Done this round. Decision #2079's option 1 is applied. Pull request #2117 to develop is open, carrying
Closes on promotion: #1634.feature/auto-1634is pushed at cd97e26, and all commits are signed. The worktree at/home/pieter/repos/worktrees/ProjectTemplate-auto-1634is still standing on that branch and is clean.- 80edf69 merges
origin/develop(6ee0bc7) with no conflicts. - 34a9dc9 fixes the four findings Choose How to Finish #1634's Lane After the Narrowed Model's Strict Passes #2079 listed: the inline-trap wording, the scoped prefix-with-argument false deny,
~as a rewrite character, and two self-test rows. The PR opened at this head. - 62ac767 answers the pass recorded before the PR opened. A dash-led option word the shell may rewrite, such as
-${F}0, is read as both a signal-0-sand a-kof no duration form. - cd97e26 answers the next pass. It covers an option value the shell may split (
-k $K), a rewritable word read as nesting ($T, a glob), and the nesting sentence scoped past prefixes and assignments. --selftestpasses, and each new row was checked by reverting its logic. The local gates are clean: ruff,prose_lint.py --diff origin/develop,repo_gate.py --check eol,spec/validate.py, anddocker_lint.py.
Local strict review. Three passes were recorded, the last on cd97e26, whose receipt covers the pushed head.
- The pass on 34a9dc9 found 1, fixed in 62ac767.
- The pass on 62ac767 found 3, fixed in cd97e26.
- The pass on cd97e26 found 3
introduced, still open. Both edit rounds for this push are spent, so Decision: How the Guard Reads a Shell-Rewritable Word in a timeout Run (#2117) #2118 lists them and gives the options.
PR review. One round landed on 34a9dc9 with no threads. A review of cd97e26 was requested but had not landed when this was written.
Remaining.
- Apply the option Decision: How the Guard Reads a Shell-Rewritable Word in a timeout Run (#2117) #2118's answer picks, then run a strict pass and push.
- Drive Deny a Signal-0 timeout as a Wait Bound in the Guard #2117 to develop per
drive-pr, then close this lane out.
Follow-ups still unfiled, carried over from round 2:
- The check could also deny
CONT,CHLD,URG,WINCH, and the stop signals on a singletimeout. - uutils
timeoutmay read some spellings as signal 0, and the check models GNU only. This needs a probe on a uutils host before anyone acts on it.
No lesson issue filed.
- 80edf69 merges
Unblocked on 2026-09-30: decision #2118 is answered, option 1: deny any rewritable word in a
timeoutrun, whatever follows it. Declare the launcher class (finding 2) as a shape not reached in README requirement 7, and file it as a follow-up. Theblockedlabel is removed so the lane can resume.Parked: waiting on decision #2196
Done this round. Decision #2118's option 1 is applied.
feature/auto-1634is pushed at 14400ce, all commits signed, and pull request #2117 to develop is still open on that head. The worktree at/home/pieter/repos/worktrees/ProjectTemplate-auto-1634is still standing on that branch and is clean.- bc7b7d5 merges
origin/develop(8679432) with no conflicts. - 8aaf7c5 applies Decision: How the Guard Reads a Shell-Rewritable Word in a timeout Run (#2117) #2118: any word between
timeoutand the wrapper that the shell may rewrite makes the run no bound, whatever follows it. The launcher class is declared not reached in README requirement 7. - 5a242c1 answers pass 1. A leading
=(zsh) counts as a rewrite, and a quoted word holding a rewrite character is declared a false deny. - 14400ce answers pass 2. The scan covers the words before the head
timeout, and the early-inner-deadline nesting is declared a false deny. --selftestpasses, and each new row was checked by reverting its logic. The local gates are clean: ruff,prose_lint.py --diff origin/develop,repo_gate.py --check eol,spec/validate.py, anddocker_lint.py.
Local strict review. Three passes were recorded, the last on 14400ce, whose receipt covers the pushed head.
- Pass 1 on 8aaf7c5: 4 findings. 2
introducedand 1 cosmetic were fixed in 5a242c1. 1pre-existingis Stop an Inherited timeout Bound From Reaching a Loop Under a Nested timeout #2055, with a new shape commented there. - Pass 2 on 5a242c1: 2
introduced, fixed in 14400ce. - Pass 3 on 14400ce: 3 findings, still open, 2 of them
introduced. Both edit rounds for this push are spent, so Settle the Last Three Strict-Pass Findings on the timeout Rewrite Scan (#2117) #2196 lists them and gives the options.
PR review. The digest at 14400ce shows no review on this head yet, 0 threads, and checks still running.
Filed this round. #2195, the launcher follow-up #2118 asked for.
Remaining.
- Apply the option Settle the Last Three Strict-Pass Findings on the timeout Rewrite Scan (#2117) #2196's answer picks, then run a strict pass and push.
- Drive Deny a Signal-0 timeout as a Wait Bound in the Guard #2117 to develop per
drive-pr, then close this lane out.
Follow-ups still unfiled, carried over from round 2:
- The check could also deny
CONT,CHLD,URG,WINCH, and the stop signals on a singletimeout. - uutils
timeoutmay read some spellings as signal 0, and the check models GNU only. This needs a probe on a uutils host before anyone acts on it.
No lesson issue filed.
- bc7b7d5 merges
Done: #2117 merged to develop
Decision #2196's option 1 is applied, and #2117 is squash-merged to develop as 8b38010. Its body carries
Closes on promotion: #1634, so #1634 closes when develop is promoted. The branchfeature/auto-1634and its worktree are removed.What the last pushes did. develop was merged in first (e182edd). The walk back from a
bash -cwrapper to its run's start was reworked across several strict passes:- A redirection, or a
)other than a function definition's, ending the walk makes the run no bound. This covers$(...),<(...), and glob groups before an innertimeout. - Quoted operators are words of the run, read from the quote mask, and an opening
(or<(ends the walk. - A function definition's name must open the command or follow an opener word or a separator other than
), and must hold no$or extglob operator. - A brace counts as a rewrite only with a comma or
..between the word's first{and last}, which is linear. A tilde counts only at a word's start or after=or:. A(inside a word counts too, for the fallback lexer. - README requirement 7 declares every false deny this adds, and the self-test carries a row for each shape, each checked by reverting its logic.
Review. Copilot's earlier rounds left one thread, about a docstring wider than 100 columns. It was fixed in c556cb0 and resolved. The later fix pushes are covered by attested local strict passes, the last recorded on 735b2a9 with 4 findings. One is #2204's class, and the other three are deferred to #2315. Per #2196, PR review disposed of later findings rather than parking again.
Filed along the way:
- Read a Run as No Bound Where the Quote Mask Is Unknown in the Wait-Loop Check #2307: the quote mask is None after an unbalanced quote. A comment adds a second trigger.
- Decide Whether the Wait-Loop Check Reads zsh EXTENDED_GLOB Operators #2308: zsh
EXTENDED_GLOBoperators. - Read a Function or Alias Shadowing timeout as No Bound in the Wait-Loop Check #2309: a function, alias, or
hashshadowingtimeoutor a prefix. - Honor the Quote Mask in the _runs_as_command Short-Circuit #2310:
_opens_commandignores the mask. - Split an Operator After an Escaped Backslash the Way Bash Does #2313: an escaped backslash before an operator.
- Allow a Bounded Wrapper Inside a function-Keyword Definition #2314:
function f { ... }with no(). - Align Three Declared Wait-Loop False Denies With What the Check Reads #2315: three declared false denies that need aligning.
- Read a timeout Sending an Ignored or Stopping Signal as No Bound #2316: ignored or stopping signals.
- Probe Which Signal Spellings uutils timeout Reads as Signal 0 #2317: uutils signal spellings. Read a timeout Sending an Ignored or Stopping Signal as No Bound #2316 and Probe Which Signal Spellings uutils timeout Reads as Signal 0 #2317 file the two follow-ups this lane carried unfiled since round 2.
No lesson issue filed.
- A redirection, or a
Next steps, in priority order
timeouthandling onfeature/auto-1634to the one shape Decide How to Close the Nested-Timeout False Deny in the Signal-0 Check (#1634) #2029 asked for: a nested chain is bounded only when every outertimeoutsends signal 0 with no kill-after and the innermost one is a bound. Deny every other nesting, declared once inhost-setup/agent-safety/README.mdrequirement 7 as a false deny. Read a variable-svalue as no bound. DeclarenohupwithHUPin the README. Merge develop in first, since develop moved.local-strict-reviewpass. If it finds nothing introduced, open the pull request to develop carryingCloses on promotion: #1634and drive it perdrive-pr. Otherwise park again.External blockers
None. Decision #2056 was answered by the maintainer and is closed.
Internal dependencies
Step 2 follows step 1. The pass judges the narrowed model, not the one #2056 replaced.
State
Branch
feature/auto-1634pushed at52d4c957, no pull request yet. Re-derive its worktree fromgit worktree list. The lane's history is on #2044. The pre-existing finding is filed as #2055.The parked decision queue
Count 0 for this lane.
What the last round did
An attended session put #2056 to the maintainer, recorded the answer, closed it, and wrote this link without
blocked. It changed no code.What not to repeat
Do not extend the passed-on-signal model (the
timeprefix,nohupagainstHUP, an outer kill-after,SIGplus digits). Each round of that model drew new findings against the round before, which is why #2056 narrowed it. Do not re-ask #2056 or #2029.New learnings
None.