feat(console): add observability configuration form

[ytallo]

Summary

• registers iii-observability in the Console-owned configuration form manifest
• exposes trace, metric and log exporters, sampling, alerts, runtime logging and durable trace storage
• keeps disk retention and memory low-watermark controls in the Worker Console

Engine UI removal: iii-hq/iii#2125

Validation

• pnpm --filter @iii-workers/console-worker-ui test
• pnpm --filter @iii-workers/console-worker-ui build
• cargo test -p console
• Chromium desktop and mobile configuration smoke tests

Known follow-ups

• the shared variant editor currently retains an empty config: {} object after changing an internally tagged alert action
• shared collection metadata text does not yet meet WCAG AA contrast

Summary by CodeRabbit

• New Features

  • Added an Observability worker configuration form to the console.
  • Added configuration options for telemetry collection, exporting, service identity, trace storage, sampling, metrics, logs, alerts, and span rules.

• Tests

  • Updated configuration coverage checks to include the new Observability worker form.

[vercel]

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Project	Deployment	Actions	Updated
workers	Ready	Preview	Sep 3, 2026 1:42am UTC
workers-tech-spec	Ready	Preview	Sep 3, 2026 1:42am UTC

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Team

Run ID: f762ce7e-9ff7-4012-82f8-f3dfa0443399

📥 Commits

Reviewing files that changed from the base of the PR and between 112cd89 and fd7e9a5.

📒 Files selected for processing (5)

• console/src/ui.rs
• console/ui/config-form.tsx
• console/ui/configuration-forms.test.mjs
• console/ui/src/configuration-forms/manifest.ts
• console/ui/src/configuration-forms/specs/observability.ts

Included review availability: Your plan provides up to 2 included reviews per hour; 1 remains after this review.

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📝 Walkthrough

Walkthrough

The PR adds a complete observability worker configuration specification. It registers the form in the console and updates manifest coverage checks from 39 to 40 workers.

Changes

Observability configuration

Layer / File(s)	Summary
Define observability configuration console/ui/src/configuration-forms/specs/observability.ts	Adds collection, storage, sampling, metrics, logs, runtime logging, alerts, and trace presentation fields with defaults, constraints, variants, and expected field paths.
Register the worker configuration console/ui/src/configuration-forms/manifest.ts, console/ui/config-form.tsx	Adds observabilityWorkerSpec to the worker manifest and registers the iii-observability configuration form.
Update registration coverage console/ui/configuration-forms.test.mjs, console/src/ui.rs	Adds iii-observability to expected IDs and updates worker configuration counts from 39 to 40.

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

Merge Risk: 🔵 Low · up to fd7e9

This adds the Observability configuration form and its Console registration. The supplied coverage indicates the form contract is wired correctly; the remaining known issues are a redundant empty config object after some alert-action edits and metadata contrast below WCAG AA, which are bounded follow-ups rather than merge blockers.

Suggested reviewers: sergiofilhowz

Poem

A rabbit inspects the tracing chart
New fields hop neatly into place
Alerts twitch, and metrics start
Sampling rules line up in grace
Forty forms now share the space

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 5 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding an observability configuration form to the Console.

• Fix all pre-merge checks with AI

✨ Finishing Touches 💡 1

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/console-observability-config-ui

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[github-actions]

skill-check — worker

0 verified, 70 skipped (no docs/).

Layer	Result
structure	✓
vale	✓
ai	✓
render	✓

Four for four. Nicely done.