v0.2.0 - Capture adapters + LangGraph integration

Highlights

• LangGraph capture adapter — CasualityCallbackHandler records chain/tool/LLM/retriever callbacks as causal events: one root run = one agent, unknown causal parents are dropped (no invented edges), frontier chaining orders siblings, and file read-after-write edges link readers to their last writer. Fail-open by design (handler.errors, never raises into your agent). Install with agent-casuality[langgraph].
• Capture adapters package — OpenCode capture moved from opencode_adapter/ to adapters/opencode/ (git history preserved; the casuality-opencode-ingest entry point is unchanged). Breaking (pre-1.0): direct imports of opencode_adapter must move to adapters.opencode.
• Replit incident case study — deterministic replay of the documented July 2025 Replit incident (examples/replit_incident.py, no API key): the destructive delete sits in the freeze's causal slice with zero approval events, the fabricated write is a direct causal parent of the "verification" read, and the false rollback claim lands two events after it. Write-up: docs/case-study-replit.md.
• Visual DAG Explorer — node labels now fall back to callback names, so LangGraph captures render tool_call · write_sql instead of repeating the event type; failure/diagnosis/evidence endpoints all work on LangGraph traces.

Also in this release

• Shared deep-redaction helper for adapters; sensitive-key regex tightened (token_usage no longer redacted, access_token-style keys still are).
• Deterministic, idempotent event IDs and JSON-safe payload truncation (4000 chars).
• Root .opencode/ is git-ignored — it's an installed copy of the canonical plugin at packages/opencode-agent-casuality/src/index.ts; the plugin-compat script installs it automatically.
• Docs: new docs/langgraph.md; README (PyPI + npm copies) re-synced.

Full changelog: https://github.com/Psionic-labs/Agent-Casuality/blob/main/CHANGELOG.md

Install: pip install agent-casuality==0.2.0 or uv add agent-casuality