feat: add Pi coding agent integration guide

[analogpvt]

Summary

• Adds integration guide for Pi coding agent with LLM Gateway
• Adds Pi to the integration cards on the UI dashboard
• Adds official Pi SVG icon from pi.dev to shared package
• Includes screenshots showing models.json config and working terminal session

Guide covers:

• Installing Pi
• Configuring ~/.pi/agent/models.json with LLM Gateway as provider
• Model selection and testing
• Environment variable support for API keys
• Troubleshooting common issues

Test plan

• Tested Pi integration locally with api.llmgateway.io — GPT-5 and Claude Sonnet 4.5 both respond correctly
• Docs build passes
• UI build passes
• Guide page renders at /guides/pi on both docs and UI
• Pi icon displays correctly in integration cards

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added Pi integration to connect the Pi terminal coding agent with LLM Gateway for centralized model access and management.

• UI

  • Added a Pi integration card to the Integrations list and introduced a Pi icon.

• Documentation

  • Published a comprehensive Pi setup guide covering configuration, quick start, adding models, API key options, and troubleshooting.

• Chores

  • Updated workspace build configuration for dependency build allowances.

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Walkthrough

Adds Pi terminal agent integration: exports a new PiIcon, wires a "Pi" integration card into the UI, adds MDX and UI docs describing how to configure Pi to use LLM Gateway (models.json, API key, testing, troubleshooting), and updates pnpm-workspace.yaml with an allowBuilds map.

Changes

Pi Integration Setup

Layer / File(s)	Summary
Pi icon component packages/shared/src/components/integration-icons.tsx	Exports new PiIcon React component rendering a Pi/π SVG and forwarding SVG props.
Integration card UI wiring apps/ui/src/components/integrations/integration-cards.tsx	Imports PiIcon and inserts a "Pi" integration entry into the integrations array with name, description, href: "/guides/pi", icon: PiIcon, and comingSoon: false.
Documentation guides (MDX + UI content) apps/docs/content/guides/pi.mdx, apps/ui/src/content/guides/pi.md	Adds Pi integration guides covering ~/.pi/agent/models.json provider configuration for LLM Gateway (baseUrl, api, apiKey, models list), model selection and reload, adding models, using an environment variable for the API key, Quick Start test, and troubleshooting for auth, model-not-found, and connection issues.
Workspace config pnpm-workspace.yaml	Replace prior built-deps lists with an allowBuilds map that marks specific native build dependencies as allowed or disallowed for workspace builds.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Possibly related PRs

• theopenco/llmgateway#2266: Similar integration card and shared icon additions in the integrations area.
• theopenco/llmgateway#2265: Also updates the integrations list to add a new integration guide/card entry.
• theopenco/llmgateway#2263: Related edits touching integrations UI and shared icon components.

Suggested reviewers

• smakosh

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main purpose of the PR—adding an integration guide for the Pi coding agent with LLM Gateway—which aligns with the primary changes across documentation, UI components, and icon assets.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@apps/docs/content/guides/pi.mdx`:
- Around line 124-139: The example in the "Using Environment Variables for the
API Key" block uses "apiKey": "LLM_GATEWAY_API_KEY" which may be interpreted as
a literal string by Pi; update the example in apps/docs/content/guides/pi.mdx so
the "apiKey" field uses the exact environment-variable reference syntax Pi
expects (replace the bare token with the correct form such as $VAR or ${VAR}
only if Pi requires that), and add a short parenthetical note citing Pi's
official docs (link or exact quoted syntax) that confirms the required format
for ~/.pi/agent/models.json; ensure you modify the JSON snippet around the
"apiKey" property and mention the Pi docs reference for verification.

In `@pnpm-workspace.yaml`:
- Around line 6-15: Remove the deprecated pnpm build-config keys by deleting the
ignoredBuiltDependencies and onlyBuiltDependencies entries and rely solely on
the allowBuilds mapping; ensure the allowBuilds object (keys like core-js,
esbuild, protobufjs, sharp, unrs-resolver) contains every package you intend to
permit building and remove any arrays or keys named ignoredBuiltDependencies or
onlyBuiltDependencies from the file so build policy is controlled only via
allowBuilds.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: b81760e4-8654-40ae-8ba0-665afa768d4b

📥 Commits

Reviewing files that changed from the base of the PR and between 8e6a20a and c25496d.

📒 Files selected for processing (3)

• apps/docs/content/guides/pi.mdx
• apps/ui/src/content/guides/pi.md
• pnpm-workspace.yaml