Cody Borders
3947180841
Security and performance fixes addressing a comprehensive review: - Server-issued HMAC-signed session cookies; client-supplied session_id ignored. Prevents session hijacking via body substitution. - Sliding-window rate limiter per IP and per session. - SessionStore with LRU eviction, idle TTL, per-session threading locks, and a hard turn cap. Bounds memory and serializes concurrent turns for the same session so FastAPI's threadpool cannot corrupt history. - Tool-use loop capped at settings.max_tool_use_iterations; Anthropic client gets an explicit timeout. No more infinite-loop credit burn. - Every tool argument is regex-validated, length-capped, and control-character-stripped. asserts replaced with ValueError so -O cannot silently disable the checks. - PII-safe warning logs: session IDs and reply bodies are hashed, never logged in clear. - hmac.compare_digest for email comparison (constant-time). - Strict Content-Security-Policy plus X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy via middleware. - Explicit handlers for anthropic.RateLimitError, APIConnectionError, APIStatusError, ValueError; static dir resolved from __file__. - Prompt cache breakpoints on the last tool schema and the last message so per-turn input cost scales linearly, not quadratically. - TypedDict handler argument shapes; direct block.name/block.id access. - functools.lru_cache on _get_client. - Anchored word-boundary regexes for out-of-scope detection to kill false positives on phrases like "I'd recommend contacting...". Literate program: - Bookly.lit.md is now the single source of truth for the five core Python files. Tangles byte-for-byte; verified via tangle.ts --verify. - Prose walkthrough, three mermaid diagrams, narrative per module. - Woven to static/architecture.html with the app's palette (background #f5f3ee) via scripts/architecture-header.html. - New GET /architecture route serves the HTML with a relaxed CSP that allows pandoc's inline styles. Available at bookly.codyborders.com/architecture. - scripts/rebuild_architecture_html.sh regenerates the HTML after edits. - code_reviews/2026-04-15-1433-code-review.md captures the review that drove these changes. All 37 tests pass.
7 lines
309 B
Plaintext
7 lines
309 B
Plaintext
ANTHROPIC_API_KEY=sk-ant-...
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# HMAC signing key for the server-issued session cookie. Generate with:
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# python -c "import secrets; print(secrets.token_urlsafe(32))"
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# If unset, a random value is generated at process start (sessions will not
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# survive a restart, which is fine for local dev).
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SESSION_SECRET=
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