perf(ui): cache build-meta in the panel's RPC client

[erkamyaman]

What and why

devframe 1.2.4 added client-side RPC caching (connectDevframe({ cacheOptions })). This turns it on in the panel for one function only, pangular:build-meta, so the Dashboard's project details stop asking the server again every time the Dashboard loads.

• PANEL_CACHED_RPC in config.ts lists the functions the panel may cache. Today that is only pangular:build-meta, which reads package.json, installed versions and angular.json/project.json, none of which a running dev server reloads.
• The panel passes cacheOptions: { functions: PANEL_CACHED_RPC }, an explicit list. With true, the panel would also cache any static or cacheable function the hub or a plugin registers.
• build-meta gets cacheable: true to document intent (it is already static).
• devframe clears the cache when the connection drops, and the panel builds a new client on reconnect, so a restarted server is always asked again.

Not cached, on purpose: the source scans, analog-project, get-http-rules, and every function that reads live page state, since their answers change while you work.

Docs: the contributing page explains PANEL_CACHED_RPC and what may go in it. The Dashboard page notes that project details are read once per connection, so you restart the dev server or reload the panel after upgrading a package or editing angular.json.

How it was verified

• pnpm commit:check
• pnpm format:check
• pnpm typecheck
• pnpm test:devtools (3102) and pnpm test:panel (738). A new panel-rpc-cache.test.ts starts a real devframe dev server and client: two build-meta calls make one server call, a non-listed query makes one server call per client call, and a new server after a close serves fresh data. The tests fail with the cache off or with another function added to the list.
• pnpm skills:check
• Docs in apps/docs updated and pnpm docs:build passes
• pnpm extension:build and extension/ui committed
• Checked in the browser with axe (no visible UI change)

Summary by CodeRabbit

• New Features
  • Project metadata is cached while the dev server connection remains active, reducing repeated requests. The cache refreshes after reconnecting.
• Documentation
  • Clarified when project details update and which information remains cached until the dev server restarts or the panel reloads.

[coderabbitai]

📝 Walkthrough

The panel now requests connection-level caching for pangular:build-meta. Tests cover cached and uncached RPC calls, cache invalidation after a server restart, and cache options on retry connections. Documentation describes the cache behavior.

Changes: Panel RPC caching

Layer / File(s)	Summary
Define and verify cached RPC behavior packages/devtools/src/config.ts, packages/devtools/src/rpc/build-meta.ts, packages/devtools/src/__tests__/panel-rpc-cache.test.ts	PANEL_CACHED_RPC lists pangular:build-meta, and getBuildMeta is marked cacheable. Integration tests cover cached responses, uncached list-pages calls, and cache clearing after a server restart.
Pass cache options through panel connections app/src/rpc.ts, app/src/app.ts, app/src/__tests__/app-shell.test.ts, apps/docs/src/content/contributing/development.md, apps/docs/src/content/inspectors/dashboard.md, extension/ui/assets/browser-agent-rpc-BXhoSh1z-rr8okg_T.js, extension/ui/index.html	The app passes cache options to each devframe connection. Retry tests check the options and closure of the dropped client. Documentation describes cache eligibility and connection behavior. The UI asset references now use index-CF_JeO4X.js.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant App
  participant DevframeClient
  participant DevframeServer
  App->>DevframeClient: Connect with cacheOptions
  DevframeClient->>DevframeServer: Call pangular:build-meta
  DevframeServer-->>DevframeClient: Return metadata
  DevframeClient->>DevframeClient: Cache response for connection
  DevframeClient->>DevframeClient: Serve repeated call from cache
  DevframeClient-->>App: Connection drops
  App->>DevframeClient: Retry with cacheOptions
  DevframeClient->>DevframeServer: Call pangular:build-meta on new connection
  DevframeServer-->>DevframeClient: Return current metadata

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Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 27.27% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 7 files. (3 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: caching build metadata in the panel RPC client.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 27.27% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 7 files. (3 skipped: 3 unsupported.)

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☁️ Nx Cloud last updated this comment at 2026-10-14 08:15:40 UTC

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Actionable comments posted: 1

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Inline comments:
Review comments at @packages/devtools/src/__tests__/panel-rpc-cache.test.ts:
- Around line 90-91: Update the test around connectDevframe() to retain the
stored connection metadata for the second connection, so it exercises the
reconnect path. Ensure the panel retry discards stale connection state or
supplies fresh connection metadata before reconnecting, rather than reusing the
old server URL.

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📥 Commits

Reviewing files that changed from the base of the PR and between e0de840 and b7ac183.

⛔ Files ignored due to path filters: 1

• extension/ui/assets/index-CF_JeO4X.js is excluded by !**/assets/index-[0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-][0-9a-z_-].js

📒 Files selected for processing: 10

• app/src/__tests__/app-shell.test.ts
• app/src/app.ts
• app/src/rpc.ts
• apps/docs/src/content/contributing/development.md
• apps/docs/src/content/inspectors/dashboard.md
• extension/ui/assets/browser-agent-rpc-BXhoSh1z-rr8okg_T.js
• extension/ui/index.html
• packages/devtools/src/__tests__/panel-rpc-cache.test.ts
• packages/devtools/src/config.ts
• packages/devtools/src/rpc/build-meta.ts

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