Pensieve enhances AI coding agents by providing fast, local search across files, repositories, and agent sessions. It delivers precise context using semantic or exact match search, reducing the need for broad grepping. Users invoke a glass-panel interface via Control+Shift to search meaningfully or by exact terms, then act on results without touching the mouse.
The tool integrates with Claude Code, Codex, Cursor, Gemini CLI, Windsurf, Claude Desktop, VS Code, and any MCP client. By limiting search scope to relevant passages, Pensieve reduces tool calls and costs. In benchmarks, agents using Pensieve averaged 2.0 tool calls per lookup versus 3.4 with grep, succeeding in 82 of 144 runs on the first try compared to 123.
It finds the right file in 0.1–0.2 seconds per search. Pensieve is free, open source, and requires Apple Silicon and macOS 14 or later. Integration adds a “search before you grep” directive to agent configs, improving efficiency and context accuracy for coding workflows.
Source: Hacker News · Summarized by HeadlinesBriefing