feat(cli): support explicit finite invocation execution budgets - #741
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📝 WalkthroughWalkthroughChangesExecution timeout override
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Feature · Severity of issue fixed: Medium Sequence Diagram(s)sequenceDiagram
participant CLI
participant ExecutionBudget
participant WFLProgram
participant ChildProcess
CLI->>ExecutionBudget: parse and apply execution-timeout
ExecutionBudget->>WFLProgram: enforce shared invocation deadline
WFLProgram->>ChildProcess: launch separate WFL child
ChildProcess-->>WFLProgram: use child configuration and deadline
Merge Risk: 🟡 Moderate · up to Runs using an execution timeout can exceed their requested deadline during a wait, so deadline enforcement should be fixed before merging. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings
🧪 Generate unit tests (beta)
🛠️ Fix failing CI checks 💡
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| "--execution-timeout" => { | ||
| if !file_path.is_empty() { | ||
| eprintln!("Error: --execution-timeout must appear before the source filename"); | ||
| process::exit(2); |
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🟡 Misplaced dump timeout is ignored
When --lex, --ast, or --parse precedes the filename, a later --execution-timeout bypasses this placement error. The argument loop stops at that filename, so dump commands succeed while ignoring the requested deadline.
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Dump modes use the same generic filename branch as executable programs. That branch stops parsing after the first filename unless lint options are active, so the new handler cannot inspect any later token. Executable programs need this stop because all later tokens are literal script arguments, but dump modes have no script arguments.
Example: wfl --lex sample.wfl --execution-timeout 3 exits successfully and writes the lexer dump. The documented placement rule instead requires exit 2 because the timeout follows sample.wfl.
Recommended fix: Keep parsing options after the filename for lex_dump and ast_dump, while preserving the current early stop for executable modes. Add argument tests for --lex, --ast, and --parse with the timeout on both sides of the filename.
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| Exact-head CI must still complete, including both real five-minute boundary | ||
| steps and the ordinary Linux/Windows program sweeps. No merge or release is | ||
| authorized by this evidence record itself. |
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🔍 Exact-head CI evidence remains pending
The evidence record leaves exact-head CI pending, including both five-minute boundary runs. Confirm every required job passed before merge.
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Reviewed commit: 68c4665046
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| let budget = std::sync::Arc::new(wfl::exec::budget::ExecutionBudget::from_config(&run_config)); | ||
| let mut budget_limits = wfl::exec::budget::BudgetLimits::from_config(&run_config); | ||
| if let Some(duration) = execution_timeout { | ||
| budget_limits.max_duration = Some(duration); |
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When a server has timeout_seconds = 10 but is launched with --execution-timeout 1, assigning the override to BudgetLimits.max_duration also shortens outbound HTTP operations inside its deadline-exempt main loop: outbound_http_deadline reads that field at src/interpreter/mod.rs:3900-3903, and run_http_with_budget selects the shorter one-second duration at lines 3951-3954. The request therefore times out after one second rather than retaining its configured ten-second per-operation timeout, contrary to the documented promise that this option does not change request/stream or configured operation limits. Keep the invocation override separate from the duration used for main-loop HTTP operations, or explicitly use run_config.timeout_seconds on that path.
AGENTS.md reference: AGENTS.md:L3-L7
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Actionable comments posted: 1
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Inline comments:
In `@TestPrograms/cli_budget/deadlines.test.wfl`:
- Around line 17-20: Update WaitForDurationStatement to limit the duration
passed to pump_websocket_events to the remaining ExecutionBudget, so waits stop
when the execution deadline is reached. Extend the deadlines test to assert
elapsed time as well as the existing timeout, error, and output expectations.
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📒 Files selected for processing (32)
.github/workflows/ci.ymlCLAUDE.mdDocs/reference/configuration-reference.mdEngineering/evidence/2026-09-20-cli-execution-budget.mdHistory/dev-diary/2026/2026-09-20-cli-execution-budget.mdREADME.mdTestPrograms/cli_budget/.wflcfgTestPrograms/cli_budget/arguments.test.wflTestPrograms/cli_budget/deadlines.test.wflTestPrograms/cli_budget/resource-policy.test.wflTestPrograms/cli_budget/server-policy.test.wflsrc/main.rstesting.mdtests/fixtures/cli_budget/.wflcfgtests/fixtures/cli_budget/arguments.wfltests/fixtures/cli_budget/child-config.wfltests/fixtures/cli_budget/denied/.wflcfgtests/fixtures/cli_budget/denied/process.wfltests/fixtures/cli_budget/late-marker.wfltests/fixtures/cli_budget/long-run.test.wfltests/fixtures/cli_budget/longer-config/.wflcfgtests/fixtures/cli_budget/longer-config/wait.wfltests/fixtures/cli_budget/marker.wfltests/fixtures/cli_budget/operations/.wflcfgtests/fixtures/cli_budget/operations/loop.wfltests/fixtures/cli_budget/owned-child.wfltests/fixtures/cli_budget/server-client.wfltests/fixtures/cli_budget/shared-child.wfltests/fixtures/cli_budget/shared-parent.wfltests/fixtures/cli_budget/slow-peer.wfltests/fixtures/cli_budget/test-mode.test.wfltests/fixtures/cli_budget/wait.wfl
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Summary
Long ordinary WFL invocations can reach the historical 300-second CLI ceiling even when a trusted caller requests a longer configured timeout. Scriptorium's complete WFL runner hit that ceiling in Linux CI 35507634634.
wfl --execution-timeout 1200 runner.wflnow grants one explicit finite invocation budget.Changes
Compatibility and risk
R3: CLI resource policy, asynchronous waits and process cleanup. The default, configured 300-second cap, server lifetime exemption, request/stream limits, explicit process-wait limits, permissions and operation/depth/size ceilings remain intact. Ordinary foreground operations still share the invocation deadline and can run longer with an explicit larger budget. Separately launched WFL children retain their own configuration unless explicitly passed an override.
Review found and corrected shorter-override server HTTP behavior, final/duration waits, dump-mode placement, and test-side cleanup that could mask a surviving child. Resource tests now observe descendants before polling/reaping and rebind the actual WebSocket port before driver cleanup. Independent review of the final source and fixtures found no remaining blocking finding. The maintainer explicitly approved this merge and the replacement official nightly. PR #741 merged on 2026-09-20 at 12:43:37 UTC as
3720dd74c82f4a1354aa64cfe66260ec3eccba93, from reviewed head358dc9eb15f61152f75f816d9e51c396cd24dd77. Postmerge gates and the automated version bump passed. The maintainer dispatched the replacement official nightly from the verified version-bump source; the entire release workflow completed successfully on 2026-09-20 at 13:28:35 UTC.Validation
84cb272c: official WFL 26.9.14 lacks the flag; capability assertions fail while the unchanged configured-timeout baseline passes. The linked consumer CI establishes the underlying 300-second limit. Initial Green68c46650is preserved.01416f4d,370ec22a,a5988f13,028ef59e, and5d781336preserve executable WFL failures for ordinary/final waits, inverse HTTP and stream policy, dump placement and pre-reap resource behavior. Product Green is30ed9462; final head is358dc9eb15f61152f75f816d9e51c396cd24dd77.cargo test --all --locked2,414 passed / 27 existing ignored, release build, fmt, strict all-target/all-feature Clippy, fuzz compilation, docs 36/36, and static hygiene passed. The later existing proxy-fixture update separately passed its 7/7 cases plus fmt/Clippy/hygiene.c0619c544b09551ce7988f58a564f50ff04e48a5e94a6f903c08a141b911c516. Scriptorium's cleandf8039cc252e2e48772ed88b9d273b98e30a67c5full invocation produced 41 functional passes + 1 deliberate failure, correctly exiting 1, in about 202 seconds. The earlier initial-candidate consumer run took 509 seconds with the same expected result; the final runtime's dedicated 305-second test independently proves the boundary. These durations are not a benchmark.crypto-commoncompiler exit 1 remains recorded in issue #740. Later diagnostic/final compilation passed; that does not establish the first failure's cause or waive any check.Both jobs checked out GitHub's merge ref
23a523bfcfe3d5015b1ab3da6dbb3272512f769f, combining exact PR head358dc9eb15f61152f75f816d9e51c396cd24dd77with basea1249033b0f1cff87ecea8282619808f727d22c3.Postmerge verification on the actual merge SHA also passed: CI 35511444476, Docker validation, configuration lint, format verification, and CodeQL. All 18 merge-commit check runs completed successfully, including the version-bump job. Both program sweeps reran every new CLI-budget suite successfully.
The postmerge long tests again passed 1/1 on each OS: Linux at 12:48:28.3086357–12:53:33.3172578 UTC (305.009s) and Windows at 12:50:38.3395485–12:55:43.5023599 UTC (305.163s), on 2026-09-20. Docs, web and hygiene checks passed afterward.
The successful version-bump job produced
23c1a4577da68d853fa30c49a17773427471eca4, version 26.9.16, directly on top of merge3720dd74. The job verified version synchronization, both lockfiles, hygiene and compilation, then pushed main and tagv26.9.16. Independent readback confirmed all eight changed files contain only version changes, the bump's sole parent is merge3720dd74, and annotated tagv26.9.16(tag objectee0f321f2dc8ba4bd1a9ebe1335bbb33c2f19890) resolves exactly to23c1a457. The maintainer dispatched Nightly #576 / run 35512196018 at 12:59:50 UTC from that exact source. The complete workflow finished successfully at 13:28:35 UTC: all 16 applicable jobs passed, with only the expected reusable-CI version-bump skip.Nightly release verification used exact source
23c1a4577da68d853fa30c49a17773427471eca4, version 26.9.16. Both program sweeps again passed all seven CLI-budget suites (Linux 188/0 failures/52 existing skips; Windows 187/0 failures/53 existing skips). Independent inspection of Linux integration and Windows integration confirmed 164 WFL passes / 0 failures / 24 existing skips per OS, docs 36/36, web 3/3 and hygiene. Their real boundary assertions passed 1/1 at 13:05:49.2268807–13:10:54.2356717 UTC (305.009s, Linux) and 13:07:19.7592908–13:12:24.9105321 UTC (305.151s, Windows).The native Windows job passed release-mode Rust and LSP tests, extension packaging, MSI creation and installer smoke testing. Linux static-linking and Debian 12 portability checks passed. The successful artifact publication job uploaded all three immutable artifacts and checksum sidecars, updated canonical status, then verified CDN downloads. The same-date GitHub nightly release remains immutable at its earlier source, as expected; the canonical CDN's versioned artifacts and status identify this publication.
73db4e8b9f725b6e1953ba453ca972e659a0388e0d343d4afea3b13fb8cfddec8cd9c852afe069f689fee014c71a9667202be9e92344f139f1605b5b167c3fe63013fbcbfc5e3792c621769bdf6ff2add7b0c64493bc3b73a836b12704ee39ffIndependent downstream provisioning verified the official Windows MSI against its immutable checksum sidecar, extracted a runtime reporting 26.9.16, and recorded executable SHA-256
32375058e0111f6c159144a8ffa9bd5b3a3bde81f578eca015149053ea4c6cbb.Independent Docker publication review verified exact source/version, all five consumer smoke checks (including deliberate failed-assertion exit 1), and published digest
sha256:1092a0c557731113f08673c764e0deb9e0b053992b4488974863f0a8d692db91. The publisher verifiednightlyandnightly-26.9.16resolve to that digest before retiringnightly-26.9.14; retirement verification passed.Checklist
Preserve auditable Red before Green; all new behavioral scenarios and test drivers are WFL. The existing Rust fixture only changes port ownership/readiness.
Preserve default/resource/security policy, embedded budget compatibility and literal child argv.
Complete local full/focused validation and independent final review; retain failure evidence.
Ship documentation, diary and CI registration with the behavior.
Inspect every required final exact-head CI check and both real long-boundary executions.
Obtain explicit maintainer approval for the merge and replacement official nightly; approved merge read back as
3720dd74c82f4a1354aa64cfe66260ec3eccba93.Verify the complete official nightly, canonical artifact checksums, native version readback, and independently reviewed Docker source/version/digest.