prepare stable release 2026.8.2601

[t3code-release]

Stable Release

Merging this PR publishes v2026.8.2601.

Previous stable: v2026.8.2600

Commits Since Previous Stable

• No commits found since the latest stable release.

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Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	12.1 KiB	12.1 KiB	−11 B (−0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	5.8 KiB	5.8 KiB	−4 B (−0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.4 KiB	6.4 KiB	−7 B (−0.1%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	55.5 KiB	55.5 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	9	9	0 (0.0%)	21	✅
Claude	Total thread wire	12.2 KiB	12.2 KiB	0 B (0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	5.8 KiB	5.8 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.4 KiB	+7 B (+0.1%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	56.4 KiB	56.4 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	9	9	0 (0.0%)	21	✅

Baseline: bebf17c · PR result: 49e8b43 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 84.1 KiB
• Claude decoded thread snapshot: 84.5 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.