chore: regenerate AGENTS.md knowledge base

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2026-02-18 01:26:19 +09:00
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+# src/hooks/anthropic-context-window-limit-recovery/ — Multi-Strategy Context Recovery
+
+**Generated:** 2026-02-18
+
+## OVERVIEW
+
+31 files (~2232 LOC). Most complex hook. Recovers from context window limit errors via multiple strategies applied in sequence.
+
+## RECOVERY STRATEGIES (in priority order)
+
+| Strategy | File | Mechanism |
+|----------|------|-----------|
+| **Empty content recovery** | `empty-content-recovery.ts` | Handle empty/null content blocks in messages |
+| **Deduplication** | `deduplication-recovery.ts` | Remove duplicate tool results from context |
+| **Target-token truncation** | `target-token-truncation.ts` | Truncate largest tool outputs to fit target ratio |
+| **Aggressive truncation** | `aggressive-truncation-strategy.ts` | Last-resort truncation with minimal output preservation |
+| **Summarize retry** | `summarize-retry-strategy.ts` | Compaction + summarization then retry |
+
+## KEY FILES
+
+| File | Purpose |
+|------|---------|
+| `recovery-hook.ts` | Main hook entry — `session.error` handler, strategy orchestration |
+| `executor.ts` | Execute recovery strategies in sequence |
+| `parser.ts` | Parse Anthropic token limit error messages |
+| `state.ts` | `AutoCompactState` — per-session retry/truncation tracking |
+| `types.ts` | `ParsedTokenLimitError`, `RetryState`, `TruncateState`, config constants |
+| `storage.ts` | Persist tool results for later truncation |
+| `tool-result-storage.ts` | Store/retrieve individual tool call results |
+| `message-builder.ts` | Build retry messages after recovery |
+
+## RETRY CONFIG
+
+- Max attempts: 2
+- Initial delay: 2s, backoff ×2, max 30s
+- Max truncation attempts: 20
+- Target token ratio: 0.5 (truncate to 50% of limit)
+- Chars per token estimate: 4
+
+## PRUNING SYSTEM
+
+`pruning-*.ts` files handle intelligent output pruning:
+- `pruning-deduplication.ts` — Remove duplicate content across tool results
+- `pruning-tool-output-truncation.ts` — Truncate oversized tool outputs
+- `pruning-types.ts` — Pruning-specific type definitions
+
+## SDK VARIANTS
+
+`empty-content-recovery-sdk.ts` and `tool-result-storage-sdk.ts` provide SDK-based implementations for OpenCode client interactions.