Cancel language-server requests without leaking pending work
Repeated completion cancellation leaves tasks in memory. Add request-scoped cleanup for all terminal paths.
- Focused work estimate
- 2h + prerequisites
- Priority in the scenario
- Medium
- Engineering practice
- Cancellation · Resource management
Estimated field mix
- Compiler and language tooling60%
- Performance engineering40%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
Fictional config editor Hazel speaks a bounded subset of the Language Server Protocol through a local transport adapter. Use a tiny declared configuration grammar and synthetic documents.
Setup prerequisites
- Define the supported protocol subset and configuration grammar.
- Create synthetic open/change/close messages and workspace fixtures.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- CLSP-101 · Reject configuration edits for unopened language-server documents
- CLSP-102 · Convert language-server positions using a declared encoding
- CLSP-103 · Apply configuration document edits in the supplied version order
- CLSP-104 · Publish configuration diagnostics for the checked document version
- CLSP-105 · Complete configuration keys only within valid assignment contexts
- CLSP-106 · Return configuration rename edits only for resolved local bindings
- CLSP-107 · Attach expected document versions to configuration code actions
Acceptance criteria
- Success removes pending entry
- Cancellation removes entry
- Late result does not emit another response
Implementation constraints
- Request IDs may be reused only per protocol rules.
Verification to include
- Complete request
- Cancel then deliver late result
Deliverables
- Request registry and cleanup tests
Rollout and recovery
Limit concurrency if cleanup cannot be guaranteed.
Value of the work
For the engineer: Practice protocol ordering and document-safe editing.
For the team: Inspect whether editor assistance preserves current user text and file boundaries.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.