[shivamhwp]

Refs: #29599

What's fixed: With Render math enabled, mobile showed \(...\) and \[...\] formulas as raw text because its native parser only recognized dollar delimiters. This updates the vendored Enriched Markdown archive to parse all four delimiters, including the reported matrix and determinant. The parser change and regression fixtures are in pingdotgg/enriched-markdown#13.

Evidence: Android 13, POCO M3 Pro. Baseline 60aec28 shows raw bracket math while dollar math renders. The fixed build at 3b4c208 renders the same matrix, determinant and inline fraction after toggling Render math off and on; code and citations remain literal.

Before:

android-before.mp4

After:

android-after.mp4

Not shown: iPad rendering. The before/after iPad run is queued; this PR stays draft until it completes.

Implemented with Opus 5.5 / Claude Code. Integrated and verified with gpt-6.1-sol / Codex.

[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	5.0 KiB	5.0 KiB	0 B (0.0%)	6.8 KiB	✅
Codex	Thread snapshot wire	3.8 KiB	3.8 KiB	0 B (0.0%)	4.9 KiB	✅
Codex	Live turn WebSocket wire	1.2 KiB	1.2 KiB	0 B (0.0%)	2.0 KiB	✅
Codex	Live turn WebSocket decoded	21.6 KiB	21.6 KiB	0 B (0.0%)	24.4 KiB	✅
Codex	Live turn messages	2	2	0 (0.0%)	8	✅
Claude	Total thread wire	5.0 KiB	5.0 KiB	+29 B (+0.6%)	6.8 KiB	✅
Claude	Thread snapshot wire	3.8 KiB	3.8 KiB	0 B (0.0%)	4.9 KiB	✅
Claude	Live turn WebSocket wire	1.2 KiB	1.3 KiB	+29 B (+2.3%)	2.0 KiB	✅
Claude	Live turn WebSocket decoded	21.9 KiB	21.9 KiB	+41 B (+0.2%)	24.4 KiB	✅
Claude	Live turn messages	1	2	+1 (+100.0%)	8	✅

Baseline: a036489 · PR result: 3b4c208 · 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: 108.5 KiB
• Claude decoded thread snapshot: 108.8 KiB

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

[shivamhwp]

Closing as superseded by #32180 (merged), whose Enriched Markdown sync covers bracket-delimited LaTeX rendering.