salsa

Mental-model reset for Salsa, the incremental computation framework for Rust. Use when building or reviewing Salsa databases, tracked functions, input/ tracked/interned structs, query pipelines, accumulators, cancellation, durability, LSP integration, memory management, cycles, or production Salsa architecture. Triggers on #[salsa::db], #[salsa::input], #[salsa::tracked], #[salsa::interned], #[salsa::accumulator], salsa::Storage, memoization, revisions, backdating, red-green algorithm, WillExecute, DidValidateMemoizedValue, Cancelled, returns(ref), no_eq, lru, cycle_fn, cycle_result, durability, or salsa::Event.

1.66x

Quality

86%

Does it follow best practices?

Impact

95%

1.66x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

Evaluation results

89%

18%

Incremental Parser and Name Resolver for a Toy Language

Salsa incremental query pipeline design

Criteria

Without context

With context

returns(ref) on large tracked fn returns

40%

100%

lru on parse function

100%

no_eq on parse function

100%

Coarse/fine split

100%

Tracked fn first arg is &dyn Db

100%

Tracked fn args are Salsa ingredients

100%

Input count is 2-5

33%

returns(ref) on large input/tracked struct fields

100%

Accumulator for diagnostics

100%

use salsa::Accumulator import

100%

Database struct has salsa::Storage

100%

Layered database traits

100%

31%

Proving Incremental Reuse in a Salsa-Based Config Analyzer

Incremental reuse test infrastructure

Criteria

Without context

With context

TestDb uses event capture callback

66%

100%

Events cleared before operation under test

100%

WillExecute used to detect re-execution

41%

100%

DidValidateMemoizedValue used to detect cache hit

100%

Queries called after mutation

100%

Cross-file isolation test

83%

100%

Synthetic revision bump test

50%

100%

Test DB implements Db trait

100%

cfg(test) module only

100%

98%

66%

LSP Change Handler with Cancellation and Durability

LSP cancellation and durability handling

Criteria

Without context

With context

Database field placed last

100%

trigger_cancellation before apply_change

83%

PendingWrite/PropagatedPanic: retry

100%

Local cancellation: stop, no retry

50%

100%

Cancelled::catch used at boundary

100%

unwind_if_revision_cancelled in loop

100%

HIGH durability for stdlib files

100%

LOW durability for workspace files

100%

Check-before-update guard

100%

Snapshot is a database clone

90%

100%

Repository: joshuadavidthomas/agent-skills
Commit: 40067f1

Evaluated: 2 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Incremental Parser and Name Resolver for a Toy Language Proving Incremental Reuse in a Salsa-Based Config Analyzer LSP Change Handler with Cancellation and Durability

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