fix(clients): restore upstream system font defaults by rynfar · Pull Request #203 · pylon-code/pylon

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

rynfar · 2026-08-31T15:14:43Z

Problem

Pylon still preferred bundled DM Sans and JetBrains Mono after the status visuals were restored to current upstream behavior. That kept web and desktop typography visibly different from the platform-native defaults, and left several early-render and annotation fallbacks coupled to font packages we no longer need.

Fix

Restore the upstream system UI and monospace stacks across the boot shell, web runtime defaults, Appearance settings, terminal canvas, and desktop annotation overlay.
Remove the bundled DM Sans and JetBrains Mono imports, package dependencies, and lockfile entries.
Keep the existing per-surface font pickers and custom-font fallback behavior unchanged.
Restore synchronous default-family probing now that every default face is platform-provided.

Verification

vp test run apps/web/src/appearanceFonts.test.ts apps/web/src/terminal/ghostty/surface.test.ts apps/web/src/components/settings/SettingsPanels.logic.test.ts apps/desktop/src/preview/AnnotationKeyboard.test.ts — 86 tests passed.
vp run -F @t3tools/web typecheck — passed.
vp run -F @t3tools/desktop typecheck — passed; two pre-existing Effect suggestions only.
vp lint ... on the affected TypeScript and generated annotation paths — zero warnings and errors.
vp fmt --check ..., vp install --frozen-lockfile --lockfile-only, and git diff --check — passed.
Re-ran apps/desktop/scripts/build-preview-annotation-css.mjs; generated output was byte-stable.
Isolated browser pass on macOS confirmed SF Pro and Menlo defaults, no bundled interface font faces, matching light/dark behavior, and successful custom-font apply/reset.

Visual evidence

State	Default labels	Local artifact
Before	DM Sans Variable / JetBrains Mono	`/tmp/pylon-system-fonts-before.png`
After	SF Pro / Menlo	`/tmp/pylon-system-fonts-after.png`

The before/after screenshots were captured at the same 1280×800 Appearance screen. GitHub user-attachment upload is pending because the available GitHub browser session is not authenticated; no external host or committed PR asset was used.

Generated with GPT-5.6-sol via Prime Agent.

Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actions · 2026-08-31T15:21:14Z

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.6 KiB	13.6 KiB	+12 B (+0.1%)	15.1 KiB	✅
Codex	Thread snapshot wire	6.9 KiB	6.9 KiB	−1 B (−0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+13 B (+0.2%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	57.2 KiB	57.2 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.6 KiB	13.6 KiB	−4 B (−0.0%)	15.1 KiB	✅
Claude	Thread snapshot wire	6.9 KiB	6.9 KiB	−7 B (−0.1%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.6 KiB	6.6 KiB	+3 B (+0.0%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	58.1 KiB	58.1 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	10	10	0 (0.0%)	21	✅

Baseline: 9c2a08d · PR result: cd2c14c · Source CI: failure

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: 109.5 KiB
Claude decoded thread snapshot: 110.2 KiB

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

fix(clients): restore upstream system font defaults
cd2c14c
Use the platform UI and monospace stacks throughout web, desktop boot, terminal, and annotation fallbacks. Remove the bundled DM Sans and JetBrains Mono assets while keeping the existing per-surface font controls.

github-actionsBot added vouch:trusted PR author is trusted by repo permissions or the VOUCHED list. size:M labels Aug 31, 2026