fix: Fix workspace graph caching. Avoid unnecessary plugin calls.

[milesj]

No description provided.

[Copilot]

Pull request overview

This PR improves workspace graph caching by making the cache key include more of the inputs that can affect the workspace graph, and by avoiding running graph-extension plugin hooks when the cached graph is reused.

Changes:

• Introduces a toolchain plugin extend_project_graph implementation in the tc-tier1 WASM test plugin to validate caching behavior and plugin invocation.
• Refactors workspace graph cache state/fingerprinting to hash project sources, config/toolchain inputs, environment, and plugin versions, and updates cache state file naming.
• Adds/updates tests to verify cache hit/miss behavior for plugin graph extension and cache invalidation scenarios.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
wasm/tc-tier1/src/lib.rs	Adds extend_project_graph hook used by tests to validate cache-hit behavior and alias extraction.
wasm/Cargo.lock	Updates dependency lockfile versions/checksums for the WASM workspace.
crates/workspace/src/workspace_cache.rs	Renames cache state and expands workspace graph fingerprint inputs.
crates/workspace/src/workspace_builder.rs	Reworks cache digest generation and plugin extension flow for the workspace graph.
crates/project-graph/tests/project_graph_test.rs	Updates cache state assertions and adds new plugin caching/invalidation tests.
crates/app/src/watchers/workspace_watcher.rs	Updates watcher cleanup to remove the new cache state file.
.moon/workspace.yml	Disables asyncGraphBuilding experiment (now commented out).

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[github-actions]

Run report for 6b36d2a0 (ubuntu-latest)

Total time: 1m 50s | Comparison time: 2m 1s | Estimated savings: 10.9s (9.0% faster)

	Action	Time	Status	Info
🟩	SyncWorkspace	412.9ms	Passed
🟩	SyncProject(types)	5.9ms	Passed
🟩	SyncProject(report)	5.4ms	Passed
🟩	SetupProto(0.58.2)	9.7s	Passed
🟩	SetupToolchain(node:22.18.0)	6.5s	Passed
🟩	SetupToolchain(yarn:4.16.0)	1.2s	Passed
⬛️	SetupToolchain(javascript)	0.3ms	Skipped
🟩	SetupEnvironment(javascript)	3.3ms	Passed
⬛️	InstallDependencies(javascript)	0.9ms	Skipped
🟩	RunTask(types:test)	1.4s	Passed
🟩	RunTask(types:typecheck)	1.5s	Passed
🟩	RunTask(types:build)	1.9s	Passed
🟩	RunTask(report:test)	2.8s	Passed
🟩	RunTask(visualizer:test)	3.2s	Passed
🟩	RunTask(visualizer:typecheck)	3.9s	Passed
🟩	RunTask(website:test)	1.6s	Passed
🟩	RunTask(report:build)	3.3s	Passed
🟩	RunTask(report:typecheck)	2.2s	Passed
🟩	RunTask(vscode-extension:typecheck)	3s	Passed
🟩	RunTask(visualizer:build)	4.5s	Passed
	And 4 more...

Expanded report

	Action	Time	Status	Info
🟩	RunTask(vscode-extension:test)	1.9s	Passed
🟩	RunTask(vscode-extension:build)	2.1s	Passed
🟩	RunTask(website:typecheck)	9.3s	Passed
🟩	RunTask(website:build)	1m 31s	Passed

Environment

OS: Linux
Matrix:

os = ubuntu-latest

Changed files

.moon/workspace.yml
crates/app/src/watchers/workspace_watcher.rs
crates/project-graph/tests/project_graph_test.rs
crates/workspace/src/workspace_builder.rs
crates/workspace/src/workspace_cache.rs
wasm/Cargo.lock
wasm/tc-tier1/src/lib.rs

[github-actions]

Run report for 6b36d2a0 (windows-latest)

Total time: 2m 2s | Comparison time: 2m 27s | Estimated savings: 24.9s (16.9% faster)

	Action	Time	Status	Info
🟩	SyncWorkspace	432.5ms	Passed
🟩	SyncProject(types)	7.1ms	Passed
🟩	SyncProject(report)	6.5ms	Passed
🟩	SetupProto(0.58.2)	9.5s	Passed
🟩	SetupToolchain(node:22.18.0)	9.3s	Passed
🟩	SetupToolchain(yarn:4.16.0)	1.6s	Passed
⬛️	SetupToolchain(javascript)	0.3ms	Skipped
🟩	SetupEnvironment(javascript)	4.3ms	Passed
⬛️	InstallDependencies(javascript)	0.6ms	Skipped
🟩	RunTask(types:typecheck)	2.3s	Passed
🟩	RunTask(types:test)	2.4s	Passed
🟩	RunTask(types:build)	3.3s	Passed
🟩	RunTask(visualizer:typecheck)	5.1s	Passed
🟩	RunTask(visualizer:test)	6.1s	Passed
🟩	RunTask(report:build)	6.7s	Passed
🟩	RunTask(website:test)	3.8s	Passed
🟩	RunTask(report:test)	3.4s	Passed
🟩	RunTask(report:typecheck)	1.2s	Passed
🟩	RunTask(vscode-extension:typecheck)	4.3s	Passed
🟩	RunTask(website:typecheck)	10.8s	Passed
	And 4 more...

Expanded report

	Action	Time	Status	Info
🟩	RunTask(visualizer:build)	7s	Passed
🟩	RunTask(vscode-extension:build)	2.8s	Passed
🟩	RunTask(vscode-extension:test)	2.6s	Passed
🟩	RunTask(website:build)	1m 38s	Passed

Environment

OS: Windows
Matrix:

os = windows-latest

Changed files

.moon/workspace.yml
crates/app/src/watchers/workspace_watcher.rs
crates/project-graph/tests/project_graph_test.rs
crates/workspace/src/workspace_builder.rs
crates/workspace/src/workspace_cache.rs
wasm/Cargo.lock
wasm/tc-tier1/src/lib.rs

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

✅ 23 untouched benchmarks

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_{Comparing fix-pg-cache (6fafeda) with master (03e0c2e)}

[cedws]

Much love for this fix, it's made a huge difference.