# Pitfall Log / 踩坑日志

项目：nano-step/nano-brain

摘要：发现 30 个潜在踩坑项，其中 0 个为 high/blocking；最高优先级：安装坑 - 失败模式：installation: Interactive MCP client auto-configuration after workspace registration。

## 1. 安装坑 · 失败模式：installation: Interactive MCP client auto-configuration after workspace registration

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this installation risk before relying on the project: Interactive MCP client auto-configuration after workspace registration
- 对用户的影响：Developers may fail before the first successful local run: Interactive MCP client auto-configuration after workspace registration
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/525 | Interactive MCP client auto-configuration after workspace registration

## 2. 安装坑 · 失败模式：installation: v2026.7.0303

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this installation risk before relying on the project: v2026.7.0303
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0303
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0303 | v2026.7.0303

## 3. 安装坑 · 来源证据：Code-graph extractor bypasses document-indexer file filters (.gitignore, max_file_size, minified) → orphan edges poison…

- 严重度：medium
- 证据强度：source_linked
- 发现：GitHub 社区证据显示该项目存在一个安装相关的待验证问题：Code-graph extractor bypasses document-indexer file filters (.gitignore, max_file_size, minified) → orphan edges poison memory_trace/graph/symbols for agents
- 对用户的影响：可能增加新用户试用和生产接入成本。
- 证据：community_evidence:github | https://github.com/nano-step/nano-brain/issues/535 | 来源讨论提到 node 相关条件，需在安装/试用前复核。

## 4. 安装坑 · 来源证据：Interactive MCP client auto-configuration after workspace registration

- 严重度：medium
- 证据强度：source_linked
- 发现：GitHub 社区证据显示该项目存在一个安装相关的待验证问题：Interactive MCP client auto-configuration after workspace registration
- 对用户的影响：可能增加新用户试用和生产接入成本。
- 证据：community_evidence:github | https://github.com/nano-step/nano-brain/issues/525 | 来源类型 github_issue 暴露的待验证使用条件。

## 5. 安装坑 · 来源证据：MCP: bind default workspace via URL query param, skip agent-side discovery

- 严重度：medium
- 证据强度：source_linked
- 发现：GitHub 社区证据显示该项目存在一个安装相关的待验证问题：MCP: bind default workspace via URL query param, skip agent-side discovery
- 对用户的影响：可能增加新用户试用和生产接入成本。
- 证据：community_evidence:github | https://github.com/nano-step/nano-brain/issues/523 | 来源类型 github_issue 暴露的待验证使用条件。

## 6. 安装坑 · 来源证据：watcher: gate code-summarize notify on files that actually yield symbols

- 严重度：medium
- 证据强度：source_linked
- 发现：GitHub 社区证据显示该项目存在一个安装相关的待验证问题：watcher: gate code-summarize notify on files that actually yield symbols
- 对用户的影响：可能增加新用户试用和生产接入成本。
- 证据：community_evidence:github | https://github.com/nano-step/nano-brain/issues/520 | 来源类型 github_issue 暴露的待验证使用条件。

## 7. 配置坑 · 可能修改宿主 AI 配置

- 严重度：medium
- 证据强度：source_linked
- 发现：项目面向 Claude/Cursor/Codex/Gemini/OpenCode 等宿主，或安装命令涉及用户配置目录。
- 对用户的影响：安装可能改变本机 AI 工具行为，用户需要知道写入位置和回滚方法。
- 证据：capability.host_targets | https://github.com/nano-step/nano-brain | host_targets=mcp_host, claude_code, claude, cursor

## 8. 配置坑 · 失败模式：configuration: Add OpenAPI 3.0 spec for the REST API, so non-MCP clients can discover all endpoints

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this configuration risk before relying on the project: Add OpenAPI 3.0 spec for the REST API, so non-MCP clients can discover all endpoints
- 对用户的影响：Developers may misconfigure credentials, environment, or host setup: Add OpenAPI 3.0 spec for the REST API, so non-MCP clients can discover all endpoints
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/530 | Add OpenAPI 3.0 spec for the REST API, so non-MCP clients can discover all endpoints

## 9. 配置坑 · 失败模式：configuration: CLI --help is misleading: -h/--help shows nothing useful, no-args starts a real server, help...

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this configuration risk before relying on the project: CLI --help is misleading: -h/--help shows nothing useful, no-args starts a real server, help list is stale
- 对用户的影响：Developers may misconfigure credentials, environment, or host setup: CLI --help is misleading: -h/--help shows nothing useful, no-args starts a real server, help list is stale
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/527 | CLI --help is misleading: -h/--help shows nothing useful, no-args starts a real server, help list is stale

## 10. 配置坑 · 失败模式：configuration: MCP: bind default workspace via URL query param, skip agent-side discovery

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this configuration risk before relying on the project: MCP: bind default workspace via URL query param, skip agent-side discovery
- 对用户的影响：Developers may misconfigure credentials, environment, or host setup: MCP: bind default workspace via URL query param, skip agent-side discovery
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/523 | MCP: bind default workspace via URL query param, skip agent-side discovery, failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/522 | MCP: bind default workspace via URL query param, skip agent-side discovery

## 11. 配置坑 · 失败模式：configuration: v2026.7.0103

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this configuration risk before relying on the project: v2026.7.0103
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0103
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0103 | v2026.7.0103

## 12. 配置坑 · 失败模式：configuration: v2026.7.0302

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this configuration risk before relying on the project: v2026.7.0302
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0302
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0302 | v2026.7.0302

## 13. 能力坑 · 能力判断依赖假设

- 严重度：medium
- 证据强度：source_linked
- 发现：README/documentation is current enough for a first validation pass.
- 对用户的影响：假设不成立时，用户拿不到承诺的能力。
- 证据：capability.assumptions | https://github.com/nano-step/nano-brain | README/documentation is current enough for a first validation pass.

## 14. 运行坑 · 失败模式：runtime: Benchmark: token cost of context-gathering with nano-brain vs. manual grep/read

- 严重度：medium
- 证据强度：source_linked
- 发现：Developers should check this runtime risk before relying on the project: Benchmark: token cost of context-gathering with nano-brain vs. manual grep/read
- 对用户的影响：Developers may hit a documented source-backed failure mode: Benchmark: token cost of context-gathering with nano-brain vs. manual grep/read
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/529 | Benchmark: token cost of context-gathering with nano-brain vs. manual grep/read

## 15. 维护坑 · 维护活跃度未知

- 严重度：medium
- 证据强度：source_linked
- 发现：未记录 last_activity_observed。
- 对用户的影响：新项目、停更项目和活跃项目会被混在一起，推荐信任度下降。
- 证据：evidence.maintainer_signals | https://github.com/nano-step/nano-brain | last_activity_observed missing

- 严重度：medium
- 证据强度：source_linked
- 发现：no_demo
- 证据：downstream_validation.risk_items | https://github.com/nano-step/nano-brain | no_demo; severity=medium

## 17. 安全/权限坑 · 存在评分风险

- 严重度：medium
- 证据强度：source_linked
- 发现：no_demo
- 对用户的影响：风险会影响是否适合普通用户安装。
- 证据：risks.scoring_risks | https://github.com/nano-step/nano-brain | no_demo; severity=medium

## 18. 安全/权限坑 · 来源证据：Add OpenAPI 3.0 spec for the REST API, so non-MCP clients can discover all endpoints

- 严重度：medium
- 证据强度：source_linked
- 发现：GitHub 社区证据显示该项目存在一个安全/权限相关的待验证问题：Add OpenAPI 3.0 spec for the REST API, so non-MCP clients can discover all endpoints
- 对用户的影响：可能影响授权、密钥配置或安全边界。
- 证据：community_evidence:github | https://github.com/nano-step/nano-brain/issues/530 | 来源类型 github_issue 暴露的待验证使用条件。

## 19. 安全/权限坑 · 来源证据：Benchmark: token cost of context-gathering with nano-brain vs. manual grep/read

- 严重度：medium
- 证据强度：source_linked
- 发现：GitHub 社区证据显示该项目存在一个安全/权限相关的待验证问题：Benchmark: token cost of context-gathering with nano-brain vs. manual grep/read
- 对用户的影响：可能阻塞安装或首次运行。
- 证据：community_evidence:github | https://github.com/nano-step/nano-brain/issues/529 | 来源类型 github_issue 暴露的待验证使用条件。

## 20. 安全/权限坑 · 来源证据：CLI --help is misleading: -h/--help shows nothing useful, no-args starts a real server, help list is stale

- 严重度：medium
- 证据强度：source_linked
- 发现：GitHub 社区证据显示该项目存在一个安全/权限相关的待验证问题：CLI --help is misleading: -h/--help shows nothing useful, no-args starts a real server, help list is stale
- 对用户的影响：可能影响授权、密钥配置或安全边界。
- 证据：community_evidence:github | https://github.com/nano-step/nano-brain/issues/527 | 来源类型 github_issue 暴露的待验证使用条件。

## 21. 能力坑 · 失败模式：capability: watcher: gate code-summarize notify on files that actually yield symbols

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this capability risk before relying on the project: watcher: gate code-summarize notify on files that actually yield symbols
- 对用户的影响：Developers may hit a documented source-backed failure mode: watcher: gate code-summarize notify on files that actually yield symbols
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/520 | watcher: gate code-summarize notify on files that actually yield symbols

## 22. 能力坑 · 失败模式：conceptual: Harness recalibration: differential gates R90-R92, retire state file, Claude Code enforcement...

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this conceptual risk before relying on the project: Harness recalibration: differential gates R90-R92, retire state file, Claude Code enforcement hook
- 对用户的影响：Developers may hit a documented source-backed failure mode: Harness recalibration: differential gates R90-R92, retire state file, Claude Code enforcement hook
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/536 | Harness recalibration: differential gates R90-R92, retire state file, Claude Code enforcement hook

## 23. 运行坑 · 失败模式：performance: Code-graph extractor bypasses document-indexer file filters (.gitignore, max_file_size, minif...

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this performance risk before relying on the project: Code-graph extractor bypasses document-indexer file filters (.gitignore, max_file_size, minified) → orphan edges poison memory_trace/graph/symbols for agents
- 对用户的影响：Developers may hit a documented source-backed failure mode: Code-graph extractor bypasses document-indexer file filters (.gitignore, max_file_size, minified) → orphan edges poison memory_trace/graph/symbols for agents
- 证据：failure_mode_cluster:github_issue | https://github.com/nano-step/nano-brain/issues/535 | Code-graph extractor bypasses document-indexer file filters (.gitignore, max_file_size, minified) → orphan edges poison memory_trace/graph/symbols for agents

## 24. 维护坑 · issue/PR 响应质量未知

- 严重度：low
- 证据强度：source_linked
- 发现：issue_or_pr_quality=unknown。
- 对用户的影响：用户无法判断遇到问题后是否有人维护。
- 证据：evidence.maintainer_signals | https://github.com/nano-step/nano-brain | issue_or_pr_quality=unknown

## 25. 维护坑 · 发布节奏不明确

- 严重度：low
- 证据强度：source_linked
- 发现：release_recency=unknown。
- 对用户的影响：安装命令和文档可能落后于代码，用户踩坑概率升高。
- 证据：evidence.maintainer_signals | https://github.com/nano-step/nano-brain | release_recency=unknown

## 26. 维护坑 · 失败模式：maintenance: v2026.7.0102

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this maintenance risk before relying on the project: v2026.7.0102
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0102
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0102 | v2026.7.0102

## 27. 维护坑 · 失败模式：maintenance: v2026.7.0104

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this maintenance risk before relying on the project: v2026.7.0104
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0104
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0104 | v2026.7.0104

## 28. 维护坑 · 失败模式：maintenance: v2026.7.0201

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this maintenance risk before relying on the project: v2026.7.0201
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0201
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0201 | v2026.7.0201

## 29. 维护坑 · 失败模式：maintenance: v2026.7.0301

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this maintenance risk before relying on the project: v2026.7.0301
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0301
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0301 | v2026.7.0301

## 30. 维护坑 · 失败模式：maintenance: v2026.7.0601

- 严重度：low
- 证据强度：source_linked
- 发现：Developers should check this maintenance risk before relying on the project: v2026.7.0601
- 对用户的影响：Upgrade or migration may change expected behavior: v2026.7.0601
- 证据：failure_mode_cluster:github_release | https://github.com/nano-step/nano-brain/releases/tag/v2026.7.0601 | v2026.7.0601