@@ 134,10 134,17 @@ log:
- *Parse-then-batch vs streaming POST:* batching keeps the wire protocol simple (NDJSON body, one HTTP call) and lets the server commit chunks atomically. Streaming would force the server to handle interrupted bodies — the RFC's chunked-commit response shape works because the body is bounded.
- *Synthesize missing turn_ids vs require source IDs:* Claude Code always provides UUIDs in current versions, but the parser can't assume that holds for older fixture files or future regressions. Synthesis preserves idempotency; the rare case of a `content[:64]` collision within one session at one timestamp is acceptable.
-**Unknowns that remain.**
-- Whether `tailscale serve` injects `Tailscale-User-Login` for daemon HTTP clients (vs only browsers). If not, I add a `lethe-token` shared-secret fallback header in the deploy step — a 5-line server change. Confirmed empirically before declaring this task done.
-- True line-size distribution of Claude Code `.jsonl` events. If it exceeds `bufio.Scanner`'s default 64 KiB token buffer, the parser uses `Scanner.Buffer(buf, maxSize)` with maxSize = 16 MiB. Captured here so the test fixtures cover the long-line case.
-- Whether the laptop's `~/.claude/projects/` ever contains files concurrent-written from multiple Claude Code processes. If yes, the parser still works (append-only, monotonic offset), but the test plan should cover it.
+### Assumptions
+
+- AS1 — The server-side ingest contract remains the locked `internal/shared/wire.TurnEvent` over `POST /api/v1/ingest`.
+- AS2 — Claude Code transcript files are append-only for the byte ranges the collector has already read.
+- AS3 — This task has one host identity and one configured Claude Code source root per collector process.
+
+### Unknowns
+
+- UK1 — Whether `tailscale serve` injects `Tailscale-User-Login` for daemon HTTP clients.
+- UK2 — True line-size distribution of Claude Code `.jsonl` events.
+- UK3 — Whether the laptop's `~/.claude/projects/` ever contains files concurrent-written from multiple Claude Code processes.
### Backwards-compatibility check