feat(mcp): show page URL, title and background state in list-pages by erkamyaman · Pull Request #263 · pangular-inspector/devtools

erkamyaman · 2026-10-10T22:37:32Z

What and why

list-pages had three gaps:

It took page URLs only from the router snapshot or the HTTP report. A page with no router and no HTTP setup was listed as "unknown", even though every component tree push already carries the page URL and title.
Titles were never listed.
A tab in the background stops reporting, so an agent reading "120s ago" could wrongly conclude the page was stale or gone.

Now:

The URL falls back to the component tree report. The HTTP URL (full location.href) and then the router URL still win, unless their report is more than the page TTL (15s) older than the tree's.
A Title column shows the newest reported title.
Pages that the page-visibility state lists as hidden are marked (background) in the Last report column, and the tool output explains what that means.
URLs go through redactUrl. Titles go through redactMessage, are clipped to 120 characters, and have table pipes escaped.

How it was verified

pnpm commit:check: 1 commit message OK
pnpm format:check: all files pass
pnpm typecheck: passes (only existing NG8107 warnings in the panel)
pnpm test:devtools: 1424 of 1430 passed. The 6 failures were 5s timeouts in unrelated files on an overloaded machine (load average about 30 on 4 cores). Those files plus the changed test files passed 68 of 69 with 2 workers, and the remaining timeout (analog-inspector) passed 5 of 5 on its own. New tests: 4 in page-platform.test.ts, 1 in agent-tools.test.ts.
pnpm test:panel: not run, no app/ change
Docs updated (apps/docs/src/content/agents/tools.md) and pnpm docs:build passes
pnpm extension:build: not needed, no app/ change
Browser axe check: not needed, no UI change

Notes for reviewers

The URL rule lives in pageDetails() in packages/devtools/src/rpc/pages.ts. It takes HTTP first, then router, keeping the old order where HTTP overwrote router. The component tree URL stands in when neither has one, or when theirs is more than PAGE_TTL_MS older than the tree's.
summarizePages takes the hidden page ids as an optional second argument, so existing callers keep working.
The table gains a column, so anything matching the old five-column header needs updating. The in-repo tests are updated.

Summary by CodeRabbit

New Features
- Page listings now show page titles alongside URLs and platform information.
- URLs use the latest available reports, falling back to the component-tree URL when other reports are unavailable or outdated.
- Hidden pages are labeled as background when reporting pauses.
- Sensitive URL and title values are redacted, long titles are shortened, and displayed text is formatted for readability.

list-pages took URLs only from the router snapshot or the HTTP report, so a page with no router and no HTTP setup was listed as "unknown", even though every component tree push already carries the page URL and title. Titles were never listed, and a tab in the background, which stops reporting, looked stale to an agent reading "120s ago". The URL now falls back to the component tree report when the HTTP and router reports have none or are more than the page TTL older than the tree. The table gains a Title column, and pages the page-visibility state lists as hidden are marked "(background)". URLs go through redactUrl and titles through redactMessage and a clip.

cloudflare-workers-and-pages · 2026-10-10T22:37:39Z

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coderabbitai · 2026-10-10T22:37:50Z

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📒 Files selected for processing (2)

packages/devtools/src/__tests__/page-platform.test.ts
packages/devtools/src/rpc/pages.ts

🚧 Files skipped from review as they are similar to previous changes (2)

packages/devtools/src/tests/page-platform.test.ts
packages/devtools/src/rpc/pages.ts

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📝 Walkthrough

Walkthrough

The page listing now includes reported URLs and titles. It uses component URLs as fallback, redacts and clips metadata, and marks hidden pages as background.

Changes

Page listing

Layer / File(s)	Summary
Select page URL and title reports `packages/devtools/src/rpc/pages.ts`, `packages/devtools/src/__tests__/page-platform.test.ts`	`pageDetails` selects HTTP URLs before router URLs, with component URLs as fallback or when the other reports are over `PAGE_TTL_MS` older than the component report. It selects the newest nonblank HTTP or component title, then trims, redacts, and clips it. Tests cover selection, fallback, redaction, escaping, and clipping.
Aggregate and render page summaries `packages/devtools/src/rpc/pages.ts`, `packages/devtools/src/__tests__/agent-tools.test.ts`, `packages/devtools/src/__tests__/page-platform.test.ts`	`summarizePages` retains titles and marks hidden pages as background. `listPagesText` displays titles and background status, and escapes table cells. Tests check the updated output.
Wire metadata into list-pages `packages/devtools/src/devframe.ts`, `apps/docs/src/content/agents/tools.md`	`pangular:list-pages` supplies router, HTTP, and component reports to `pageDetails`, then passes metadata and visibility data into page summarization. Its description covers URL fallback and background pages.

Priority: ⬇️ Low

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

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant Devframe
  participant pageDetails
  participant summarizePages
  participant listPagesText
  Devframe->>pageDetails: Provide router, HTTP, and component reports
  pageDetails-->>Devframe: Return URL and title metadata
  Devframe->>summarizePages: Provide inspector reports, metadata, and visibility
  summarizePages-->>Devframe: Return merged page summaries
  Devframe->>listPagesText: Provide page summaries
  listPagesText-->>Devframe: Return the page table

Merge Risk: ⚪ Minimal · up to 303b0

The page-listing change is mergeable after normal checks; no actionable defect was established.

Pre-merge checks | 4 | 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 4 files.	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 changes: adding page URLs, titles, and background-state markers to `list-pages`.
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.

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Inline comments:
Review comments at @packages/devtools/src/rpc/pages.ts:
- Line 151: Update the URL cell in the page table row so the formatted value
from code(page.url) is passed through cell, matching the title cell and escaping
literal pipes. Keep the existing unknown fallback for pages without a URL.
- Around line 86-91: Update the URL selection logic around `preferred` to check
the HTTP and router reports independently against the `fallback` age threshold
before choosing a URL. When HTTP is stale but the router report is recent,
select the router URL rather than the component URL; preserve the component
fallback when both reports are stale or unavailable.

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📒 Files selected for processing (5)

apps/docs/src/content/agents/tools.md
packages/devtools/src/__tests__/agent-tools.test.ts
packages/devtools/src/__tests__/page-platform.test.ts
packages/devtools/src/devframe.ts
packages/devtools/src/rpc/pages.ts

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When the HTTP report was stale but the router report was fresh, list-pages fell back to the component tree URL and skipped the router URL. Check each report's age on its own. Also escape pipes in the URL cell so a URL with one no longer splits the table row.

erkamyaman requested a review from santoshyadavdev as a code owner October 10, 2026 22:37

github-actions Bot added area: package The ng-devtools package (packages/ng-devtools) area: agents MCP server, agent tools and resources area: docs The documentation site labels Oct 10, 2026

erkamyaman mentioned this pull request Oct 10, 2026

fix: close server data flow gaps found in an audit #259

Merged

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coderabbitai Bot reviewed Oct 10, 2026

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Comment thread packages/devtools/src/rpc/pages.ts Outdated

Comment thread packages/devtools/src/rpc/pages.ts Outdated

erkamyaman mentioned this pull request Oct 10, 2026

feat(forms): add path and type filters and a visible event limit to the timeline #264

Merged

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erkamyaman merged commit 4dc6bfd into main Oct 11, 2026
7 of 8 checks passed

erkamyaman deleted the mcp/list-pages-details branch October 11, 2026 01:48

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feat(mcp): show page URL, title and background state in list-pages - #263

feat(mcp): show page URL, title and background state in list-pages#263
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mcp/list-pages-details

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