feat(projects): support custom project monograms

[rynfar]

Projects can use a chosen one- or two-character monogram while Pylon's automatic title-based icon remains available. The picker offers this option only when every environment in the project group supports it, so an older server cannot silently store a different icon.

The contract encodes monograms in the legacy folder-code Lucide wire form with a monogramText hint. The server validates grapheme count at the command boundary, and events and projections preserve the compatible representation. Web/desktop render the chosen icon. Mobile's six project-icon surfaces now render chosen monograms and emoji with the selected color; arbitrary Lucide names still use the existing generic mobile fallback because the native symbol set has no dynamic Lucide renderer. Invalid stored hints fall back to Lucide. Resetting the icon restores automatic selection.

Upstream sources reviewed: 438465d6b7dd2e50dd38862a0db1252d2d72ecfc, 6f7aaffe26f0e6ae3d47b0ae512b322f890e0f43, and 7a368fe7c45a45c284f1b064e440a2d696452b07. The optional Hermes lint-rule expansion 37a8ab2b29dfa33b4e20ad709a9860f0da7b7eb2 and SVG menu alignment are separate candidates. Tracking: #736.

Validation: 4 focused suites / 122 tests; scoped contracts, server, web and mobile typechecks; scoped lint and format; diff check. Independent GPT-6 Sol adversarial review found the mobile tint issue, which was fixed and rechecked. In an isolated browser, I set Å7 in violet, confirmed it in project settings, then reset to automatic. An isolated iPhone 17 Simulator showed the icon in the project chooser and updated back to a folder immediately on reset. Android tooling is unavailable on this host.

Web before (automatic):

Web after (custom):

iOS before (automatic):

iOS after (custom):

Implemented with GPT-6 Sol via the Pylon Codex harness; reconciled and reviewed with GPT-6 Codex.

[vercel]

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[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	14.0 KiB	13.9 KiB	−94 B (−0.7%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.3 KiB	7.3 KiB	−4 B (−0.1%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.8 KiB	6.7 KiB	−90 B (−1.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	58.0 KiB	58.0 KiB	−88 B (−0.1%)	66.4 KiB	✅
Codex	Live turn messages	10	8	−2 (−20.0%)	21	✅
Claude	Total thread wire	14.0 KiB	14.0 KiB	+9 B (+0.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.3 KiB	7.3 KiB	+4 B (+0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.8 KiB	6.8 KiB	+5 B (+0.1%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.9 KiB	58.9 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	9	9	0 (0.0%)	21	✅

Baseline: dfe598d · PR result: 3d04ec3 · 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: 115.7 KiB
• Claude decoded thread snapshot: 116.4 KiB

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

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated
pylon-marketing	Ignored	Preview	Sep 27, 2026 12:30am UTC