Append-Only Auditability Commitment

Description

A cross-cutting design commitment the paper identifies: session transcripts are append-only JSONL with read-time chain patching; permissions are not restored across session boundaries; context compaction applies read-time projections over full history rather than destructive edits. Preserves ability to resume, fork, and audit sessions without modifying previously written state. Cost: richer structured queries (e.g., all tool calls that modified file X across sessions) require post-hoc reconstruction rather than direct lookup.

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src-20260423-0cff68d3291b