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Mar 27, 2026
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clean: stale docs/comments 2026-03-27 #6

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12 changes: 7 additions & 5 deletions CLAUDE.md
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# CLAUDE.md — GroupThink

LLM-powered tab grouping Chrome extension. Groups browser tabs by topic and intent using Claude, displayed in a zoomable d3 treemap.
LLM-powered tab grouping Chrome extension. Groups browser tabs by topic and intent using Claude or local models via Ollama, displayed in a zoomable d3 treemap.

## Commands

Expand Down Expand Up @@ -40,7 +40,7 @@ src/
SpecificitySlider.tsx 1–10 granularity control
TabCard.tsx, TabGroup.tsx, GroupGrid.tsx Legacy grid components (unused by treemap)
lib/
ai.ts Anthropic SDK wrapper — groupTabs, sweepUncategorized, refineGrouping
ai.ts LLM client layer (Anthropic + Ollama) — groupTabs, sweepUncategorized, refineGrouping
prompts.ts System prompt + per-call prompt builders
grouping.ts flattenForSpecificity, shouldRePrompt, moveTab, mergeStepResults, mergeSmallGroups
treemap-layout.ts d3-hierarchy layout engine — computeUnifiedLayout
Expand All @@ -58,7 +58,7 @@ src/

## Key invariants

- `ai.ts` (Anthropic SDK) is **only imported in `src/background/index.ts`** — never in app/components
- `ai.ts` (LLM client layer) is **only imported in `src/background/index.ts`** — never in app/components
- App communicates with background via `chrome.runtime.sendMessage`
- Cache-first loading: app shows cached grouping instantly on mount; regrouping only fires on explicit user action (Refresh, slider, chat)
- No silent refresh mid-navigation — avoids swapping groups while user is focused inside one
Expand All @@ -71,15 +71,17 @@ src/
```json
{
"ANTHROPIC_API_KEY": "sk-ant-...",
"ANTHROPIC_MODEL": "claude-sonnet-4-20250514"
"ANTHROPIC_MODEL": "claude-sonnet-4-20250514",
"OLLAMA_BASE_URL": "http://localhost:11434",
"OLLAMA_MODEL": "llama3"
}
```

`scripts/inject-env.js` reads this at build time and writes `src/lib/env.ts`. The background service worker auto-configures on install.

## Things NOT to do

- Do not import AI SDK or `ai.ts` outside of `src/background/`
- Do not import LLM client (`ai.ts`) outside of `src/background/`
- Do not fire silent grouping refresh from the cache-hit path
- Do not create domain-based tab groups (no "YouTube", "GitHub" groups) — always topic-based
- Do not skip tab ID deduplication when building layout segments
Expand Down