| FMRS | 72 / 100 · B | 80 / 100 · B | 79 / 100 · B |
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| Reliability | 11 / 20 | 14 / 20 | 12 / 20 |
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| Security and permissions | 14 / 20 | 16 / 20 | 16 / 20 |
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| Maintenance | 15 / 20 | 17 / 20 | 18 / 20 |
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| Documentation | 18 / 20 | 15 / 20 | 18 / 20 |
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| Setup experience | 14 / 20 | 18 / 20 | 15 / 20 |
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| Best for | - Developers who run several coding agents (Claude Code, Codex, Cursor, Copilot CLI, OpenClaw, opencode, Gemini CLI, Qwen Code, Kimi Code, Zed and more) and want them to share one history
- Users who want memory to stay entirely local, with no LLM or embedding key required for default search
- Engineers who need to reach back into months-old sessions to reuse prior fixes and decisions
| - Developers using fast-moving frameworks/libraries worried about the AI suggesting stale code
- Scenarios wanting zero-config documentation lookup
| - Developers auditing NPM dependencies within AI workflows
- Teams performing supply chain security assessments
- Users of Claude Desktop, Cursor, or VS Code
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| Not for | - Users looking for a hosted or cloud knowledge base rather than local session history
- Users unwilling to send (redacted, truncated) indexed text to a remote embedding endpoint, unless they configure a local Ollama or LM Studio runtime
- Organizations that need a managed, multi-tenant, centrally administered memory service
- Users expecting semantic recall with zero configuration, since it requires setting DEJA_EMBED_URL and related variables explicitly
| - Looking up internal/private codebase documentation (Context7 targets publicly published open-source libraries)
- Cases needing very high coverage of obscure, niche libraries (coverage depends on what Context7's platform has indexed)
| - Projects outside the NPM ecosystem (e.g., pure Python/Go)
- Environments without network access to deps.dev, OSV.dev, and the npm registry
- Scenarios requiring maintenance by an official upstream vendor
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| Required permissions | - Reads the session-history directories of the agents on this machine (for example Claude Code's `~/.claude/projects`, Codex's `~/.codex/sessions`, Cursor's state.vscdb)
- Writes a local inverted index and vector sidecar (.vectors.bin) under `~/.cache/deja`
- `deja install` writes user-level guidance files (or a marked block inside them) for each harness it detects; `--no-guidance` opts out
- Some harness parsers rely on local tooling: Cursor, Grok Build, Hermes, opencode, Crush and Zed need sqlite3; DeepSeek Harness and Zed need zstd
- Network access is used only by `deja update`, `deja sync ssh`, and the version check in `deja doctor`; a remote endpoint receives redacted indexed text only after DEJA_EMBED_URL is configured
| - Usable without an API key (subject to a free-tier rate limit); CONTEXT7_API_KEY is an optional credential for higher quota
- Read-only documentation lookup — no code execution or local filesystem access involved
| - Network access to the NPM registry and external services (deps.dev, OSV.dev, OpenSSF, npms.io, GitHub)
- Read access to workspace lockfiles (pnpm-lock.yaml, package-lock., yarn.lock) for cache invalidation
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| Risks and side effects | - Redaction is pattern matching, not secret detection: a shape it does not recognize can pass through into digests, share output or sync exports
- Secrets already present in the original harness files stay in those files; deja-vu does not modify the sources
- With a remote embedding endpoint configured, redacted indexed text (truncated to about 2k characters) leaves the machine; Ollama or LM Studio keeps embedding local
- `deja forget` removes sessions from a rebuilt index and writes tombstones, but does not delete the underlying harness files
- Session formats vary per harness and can change across versions, affecting parser completeness
| - The free tier has limited quota — high-frequency use may hit rate limits
- Documentation content comes from Context7's platform index, so its accuracy and freshness depend on that platform's crawl cadence
| - Third-party READMEs and changelogs are untrusted external content; they are wrapped in tags with _meta flags but should still be handled cautiously
- Depends on availability and accuracy of external services
- Batch requests are capped at 25 packages to prevent registry enumeration; larger sets require batching
- Third-party open source project, not officially maintained by NPM or Anthropic
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| Supported clients | Claude Code, Codex CLI, Cursor, Copilot CLI, VS Code Copilot Chat, Gemini CLI, Qwen Code, opencode, Zed, Cline, Goose, Kimi Code, OpenClaw, Roo Code, Continue, Crush, aider | Claude Code, VS Code, Cursor, Cline, Amp | Claude Desktop, VS Code, Cursor, Smithery.ai |
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| Tools | 1 | 2 | 19 |
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