Record F34, F35 and F36 from run 5's second attempt

Run 5 reached the phase transition, further than any previous run, then stopped
on F36: the adapter emits a rotation reason the validator refuses.

Each defect tonight was reachable only after the previous fix. Tests passed
throughout.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011xsXyr5J1RACo71YeKG3Pu

BURNIN.md

@@ -1482,3 +1482,63 @@ F31  DEPLOYED, still awaiting a first rotation
 F32  DEPLOYED, live-proven, slot reaped and freed
 F33  fixed in 32220d9, needs a rebuild, BLOCKS every launch nondeterministically
 ```
+
+## Run 5, second attempt: two more layers, 2026-08-28
+
+The stuck launch was recovered by hand, one Enter into the pane. That is an
+operator recovery of a keystroke Orchestra believed it had already delivered,
+not a lifecycle intervention, and F35 turns it into an action for next time.
+
+### F34, live-proven while being written
+
+```text
+01:33:37  first renewal allowed, no baseline, lease extends 21:43 -> 22:03
+```
+
+The pane had not changed since 01:13 and held unsent text. The renewal gate
+exempts a lease with no baseline, which grants a full free period to exactly
+the case the gate exists to catch. Fixed in `92f32d6` by baselining the
+progress hash at launch.
+
+### F35: nothing could re-poke a pane
+
+The UI offered `grant_approval`, `deny_approval`, `handoff`, `release`, `block`
+and `complete`. Orchestra can put text in an editor and be wrong about whether
+it landed, and the only recovery was to destroy the lease and wait out expiry.
+
+`resubmit` presses Enter on text Orchestra itself submitted. No lifecycle
+change, so no event; fenced like an approval, on a live worker-owned pane at
+the capture revision the operator was looking at. In `92f32d6`.
+
+### The gate, half cleared
+
+```text
+01:36:35  phase request accepted: frame to research
+01:36:35  acceptance delivered, confirmation=queued
+01:36:35  phase changed: session rotating
+```
+
+Further than any previous run. `work_phase` reached `research` and the request
+artifact was consumed.
+
+### F36: the two halves of the handoff contract disagreed
+
+```text
+before  adapter: invalid handoff answer: invalid handoff authored field: prose smuggled into list
+after   adapter: upload handoff: invalid handoff meta
+```
+
+F31 cleared the parse, and the release then failed one stage later.
+`handoffReason` has emitted `phase_changed` since phase rotations landed. The
+validator's `reasons` list was never extended, so every phase rotation built a
+handoff it then refused.
+
+Fixed in `b9ca365`. The test asserts the property, not the constant: every
+reason the adapter can produce must survive `Validate`, including its fallback.
+
+### Pattern worth naming
+
+Six defects tonight, each hidden behind the one before it. F30 was reachable
+only once F29 let an operator act, F32 only once F30 tried to reap, F34 and F36
+only once F33 and F31 let execution get that far. Tests passed throughout. The
+only thing that surfaced any of them was running the system.