chore(deps): bump uv to 0.12.5

[rnegron]

Problem

• The Python 3.14.7 upgrade needs uv 0.12, because uv 0.11 cannot download that interpreter.
• Python stays at 3.13.13.

Changes

• CI, Docker images, sandbox installers and Flox install uv 0.12.5.
• Intel Macs (x86_64-darwin) keep uv 0.11.25 in Flox. The catalog has no uv 0.12 build for them.
• The LLM gateway Dockerfile only bumps its uv stage.

Note

Review the uv 0.12.0 breaking changes.

How did you test this code?

• The Flox lock differs from master only in its uv entries.
• A Depot smoke run passed with the shared uv action at 0.12.5.
• Not run locally: Docker image builds, Flox activation, backend suites.

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Automatic notifications

• Publish to changelog?

Docs update

None.

🤖 Agent context

Autonomy: Human-driven (agent-assisted)

• Claude Code wrote the change (session) and Codex continued it.
• A later session removed the checker rewrite and the docs update.
• Skills: /authoring-ci-workflows, /code-review, /debugging-ci-failures, /depot-ci, /qa-team, /running-ci-preflight, /simplify, /stacking-prs, /writing-code-comments, /writing-dataclasses, /writing-pr-descriptions, /writing-tests, /writing-user-facing-copy.
• CodeRabbit CLI: not run.

https://claude.ai/code/session_012riLKDv19ABh5TM3gESJLS

[trunk-io]

😎 Stack merged successfully - details.

[github-actions]

🤖 CI report

🚨 Trunk lane — universal lane

This PR is assigned to the universal lane. It cannot merge in parallel with other PRs, so it can take longer to merge. Ask dev-ex if you think this is wrong.

⚠️ Bundle size — 🔺 +6.7 KiB (+0.0%)

Uncompressed size of every built .js bundle, compared against the base branch.

Total: 68.68 MiB · 🔺 +6.7 KiB (+0.0%)

File	Size	Δ vs base
posthog-app/_parent/products/metrics/frontend/MetricsScene.js	90.0 KiB	🔺 +4.6 KiB (+5.4%)
exporter/src/exporter/scenes/ExporterNotebookScene.js	3.43 MiB	🔺 +1.1 KiB (+0.0%)

_{Posted automatically by build-bundle-size-report · uncompressed bytes from dist-report}

⚠️ Eager graph — 1 over budget

How much code each root ships on the eager path — downloaded and parsed before the surface is interactive. Measured from the esbuild output chunks (post-tree-shake, static imports only); lazy import() / React.lazy chunks are not counted.

Root	Eager (shipped)	Δ vs base	Budget
entry (logged-out pages, app bootstrap) src/index.tsx	1.54 MiB · 22 files	no change	███░░░░░░░ 34.1% of 4.51 MiB
🟡 logged-out boot: index + App + bootApp (preloaded by every page, including /login) src/index.tsx + src/scenes/App.tsx + src/scenes/bootApp.ts	6.66 MiB · 1,552 files	🔺 +100 B (+0.0%)	██████████ 118.3% of 5.63 MiB
authenticated shell (every logged-in page) src/scenes/AuthenticatedShell.tsx	7.71 MiB · 2,687 files	🔺 +1.0 KiB (+0.0%)	█████████░ 87.8% of 8.77 MiB

🟢 node_modules/monaco-editor/ stays out of src/index.tsx
🟢 src/lib/components/ActivityLog/describers stays out of src/index.tsx
🟢 [object Object] stays out of src/index.tsx
🟢 [object Object] stays out of src/index.tsx
🟢 node_modules/monaco-editor/ stays out of src/index.tsx + src/scenes/App.tsx + src/scenes/bootApp.ts
🟢 src/layout/navigation-3000/navigationLogic.tsx stays out of src/index.tsx + src/scenes/App.tsx + src/scenes/bootApp.ts
🟢 src/scenes/dashboard/dashboardLogic.tsx stays out of src/index.tsx + src/scenes/App.tsx + src/scenes/bootApp.ts
🟢 node_modules/monaco-editor/ stays out of src/scenes/AuthenticatedShell.tsx
🟢 src/lib/components/ActivityLog/describers stays out of src/scenes/AuthenticatedShell.tsx
🟢 [object Object] stays out of src/scenes/AuthenticatedShell.tsx
🟢 src/scenes/session-recordings/player/sessionRecordingPlayerLogic.ts stays out of src/scenes/AuthenticatedShell.tsx
🟢 [object Object] stays out of src/scenes/AuthenticatedShell.tsx
🟢 [object Object] stays out of src/scenes/AuthenticatedShell.tsx

Largest files eagerly shipped from src/index.tsx

Size	File
126.8 KiB	../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js
24.6 KiB	../node_modules/.pnpm/buffer@6.0.3/node_modules/buffer/index.js
6.3 KiB	../node_modules/.pnpm/react@18.3.1/node_modules/react/cjs/react.production.min.js
4.5 KiB	../node_modules/.pnpm/@jspm+core@2.1.0/node_modules/@jspm/core/nodelibs/browser/process.js
3.9 KiB	../node_modules/.pnpm/scheduler@0.23.2/node_modules/scheduler/cjs/scheduler.production.min.js
1.4 KiB	../node_modules/.pnpm/base64-js@1.5.1/node_modules/base64-js/index.js
1.3 KiB	src/index.tsx
1.3 KiB	src/RootErrorBoundary.tsx
912 B	../node_modules/.pnpm/ieee754@1.2.1/node_modules/ieee754/index.js
854 B	src/scenes/ChunkLoadErrorBoundary.tsx

Largest files eagerly shipped from src/index.tsx + src/scenes/App.tsx + src/scenes/bootApp.ts

Size	File
291.3 KiB	../node_modules/.pnpm/posthog-js@1.429.2_@types+react@18.3.27_react@18.3.1/node_modules/posthog-js/dist/module.mjs
267.7 KiB	../node_modules/.pnpm/@posthog+icons@0.38.0_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules/@posthog/icons/dist/posthog-icons.es.js
261.1 KiB	src/taxonomy/core-filter-definitions-by-group.json
126.8 KiB	../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js
103.5 KiB	src/lib/api.ts
93.3 KiB	../node_modules/.pnpm/prosemirror-view@1.40.1/node_modules/prosemirror-view/dist/index.js
90.6 KiB	../node_modules/.pnpm/@tiptap+core@3.20.6_@tiptap+pm@3.20.6/node_modules/@tiptap/core/dist/index.js
79.4 KiB	src/products.tsx
68.9 KiB	src/lib/lemon-ui/icons/icons.tsx
62.6 KiB	src/lib/utils/eventUsageLogic.ts

Largest files eagerly shipped from src/scenes/AuthenticatedShell.tsx

Size	File
291.3 KiB	../node_modules/.pnpm/posthog-js@1.429.2_@types+react@18.3.27_react@18.3.1/node_modules/posthog-js/dist/module.mjs
267.7 KiB	../node_modules/.pnpm/@posthog+icons@0.38.0_react-dom@18.3.1_react@18.3.1__react@18.3.1/node_modules/@posthog/icons/dist/posthog-icons.es.js
261.1 KiB	src/taxonomy/core-filter-definitions-by-group.json
153.8 KiB	../node_modules/.pnpm/re2js@0.4.1/node_modules/re2js/build/index.esm.js
126.8 KiB	../node_modules/.pnpm/react-dom@18.3.1_react@18.3.1/node_modules/react-dom/cjs/react-dom.production.min.js
103.5 KiB	src/lib/api.ts
95.9 KiB	../packages/quill/packages/quill/dist/index.js
93.3 KiB	../node_modules/.pnpm/prosemirror-view@1.40.1/node_modules/prosemirror-view/dist/index.js
90.6 KiB	../node_modules/.pnpm/@tiptap+core@3.20.6_@tiptap+pm@3.20.6/node_modules/@tiptap/core/dist/index.js
79.4 KiB	src/products.tsx

_{Posted automatically by check-eager-graph · sizes are eager output bytes (shipped, post-tree-shake) from the esbuild metafile · part of #32479}

✅ Toolbar bundle — eager 2.31 MiB within budget

What the toolbar ships to customer pages, measured from the esbuild output (minified, post-tree-shake). The eager set is the entry plus everything statically imported from it — fetched before any feature runs; deferred chunks load lazily. The eager guardrail is 5.72 MiB. Each output file must also stay below 10 MB, where CloudFront stops compressing it. The module boundary is enforced separately by check-toolbar-graph.

Metric	Size	Δ vs base	Budget
Eager (shipped) entry + static imports	2.31 MiB · 18 files	no change	████░░░░░░ 40.3% of 5.72 MiB
Deferred (lazy)	2.12 MiB · 45 files	no change	n/a — loads on demand
Loader dist/toolbar.js	1.1 KiB	no change	█░░░░░░░░░ 5.8% of 19.5 KiB

Largest eagerly-shipped chunks

Size	File
762.8 KiB	dist/toolbar/toolbar-app-EB7CUUF3.css
620.0 KiB	dist/toolbar/chunk-chunk-LNXRQCHU.js
484.8 KiB	dist/toolbar/chunk-chunk-4WWWD3MR.js
136.2 KiB	dist/toolbar/chunk-chunk-A5VQZO4K.js
131.8 KiB	dist/toolbar/chunk-chunk-FDH2IBXT.js
72.2 KiB	dist/toolbar/toolbar-app-XD345M6F.js
69.0 KiB	dist/toolbar/chunk-chunk-TSAL54PB.js
35.6 KiB	dist/toolbar/chunk-chunk-G4YMNBKG.js
21.0 KiB	dist/toolbar/chunk-chunk-GKC652OX.js
6.8 KiB	dist/toolbar/chunk-chunk-DV7IWQNF.js

_{Posted automatically by check-toolbar-size · sizes are toolbar output bytes (shipped, post-tree-shake) from the esbuild metafile}

✅ Dist folder size — 🔺 +74.1 KiB (+0.0%)

Total size of the built frontend/dist folder (all assets), compared against the base branch.

Total: 1468.40 MiB · 🔺 +74.1 KiB (+0.0%)

ℹ️ MCP UI apps size — 33 app(s), 17701.5 KB JS

Built size of each MCP UI app (main.js + styles.css).

App	JS	CSS
debug	601.1 KB	197.0 KB
action	459.3 KB	197.0 KB
action-list	565.9 KB	197.0 KB
cohort	458.3 KB	197.0 KB
cohort-list	564.9 KB	197.0 KB
email-template	458.1 KB	197.0 KB
error-details	473.9 KB	197.0 KB
error-issue	458.9 KB	197.0 KB
error-issue-list	565.8 KB	197.0 KB
experiment	563.0 KB	197.0 KB
experiment-list	566.7 KB	197.0 KB
experiment-results	568.2 KB	197.0 KB
feature-flag	568.7 KB	197.0 KB
feature-flag-list	572.4 KB	197.0 KB
feature-flag-testing	462.5 KB	197.0 KB
inline-scan	458.7 KB	197.0 KB
insight-actors	564.1 KB	197.0 KB
invite-email-preview	457.5 KB	197.0 KB
llm-costs	561.0 KB	197.0 KB
session-recording	460.0 KB	197.0 KB
survey	459.8 KB	197.0 KB
survey-global-stats	563.7 KB	197.0 KB
survey-list	566.6 KB	197.0 KB
survey-stats	563.7 KB	197.0 KB
trace-span	458.6 KB	197.0 KB
trace-span-list	565.8 KB	197.0 KB
vision-observation-list	565.0 KB	197.0 KB
workflow	458.6 KB	197.0 KB
workflow-list	565.2 KB	197.0 KB
loops-review	462.9 KB	197.0 KB
query-results	758.1 KB	197.0 KB
render-ui	841.3 KB	197.0 KB
visual-review-snapshots	463.1 KB	197.0 KB

⚠️ Playwright — 1 flaky

🎭 Playwright report · View test results →

⚠️ 1 flaky test:

• Early access feature new and list (chromium)

These issues are not necessarily caused by your changes.
Annoyed by this section? Help fix flakies and failures and it will go green!

✅ Backend coverage — all changed backend lines covered

🧪 Backend test coverage

Patch coverage — changed backend lines (products + core): ████████████████████ 100.0% (1 / 1)

All changed backend lines are covered ✅

Per-product line coverage (touched products)

Product	Coverage	Lines
platform_features	██░░░░░░░░░░░░░░░░░░ 12.1%	7 / 58
warehouse_sources_queue	██████░░░░░░░░░░░░░░ 29.1%	92 / 316
demo	████████████░░░░░░░░ 62.1%	1,660 / 2,671
data_tools	█████████████░░░░░░░ 62.9%	95 / 151
batch_exports	████████████████░░░░ 79.9%	19,486 / 24,391
apm	█████████████████░░░ 83.9%	1,243 / 1,481
cdp	█████████████████░░░ 85.5%	4,380 / 5,125
signals	█████████████████░░░ 86.0%	38,290 / 44,517
product_tours	██████████████████░░ 88.0%	1,312 / 1,491
data_warehouse	██████████████████░░ 88.9%	12,858 / 14,461
notebooks	██████████████████░░ 89.2%	11,790 / 13,216
cohorts	██████████████████░░ 89.4%	7,584 / 8,487
dashboards	██████████████████░░ 89.6%	6,873 / 7,667
business_knowledge	██████████████████░░ 89.7%	4,764 / 5,313
engineering_analytics	██████████████████░░ 90.1%	8,391 / 9,310
tasks	██████████████████░░ 90.3%	67,360 / 74,568
data_modeling	██████████████████░░ 90.4%	9,512 / 10,519
streamlit_apps	██████████████████░░ 90.7%	2,625 / 2,895
managed_warehouse	██████████████████░░ 90.7%	9,423 / 10,384
exports	██████████████████░░ 91.1%	9,341 / 10,256
links	██████████████████░░ 91.2%	197 / 216
mcp_analytics	██████████████████░░ 91.3%	4,493 / 4,922
conversations	██████████████████░░ 91.5%	22,744 / 24,864
visual_review	██████████████████░░ 91.8%	7,604 / 8,287
canvas	██████████████████░░ 91.9%	5,848 / 6,361
error_tracking	██████████████████░░ 92.1%	13,502 / 14,662
alerts	██████████████████░░ 92.3%	6,119 / 6,629
notifications	███████████████████░ 92.5%	1,125 / 1,216
early_access_features	███████████████████░ 92.6%	1,341 / 1,448
managed_migrations	███████████████████░ 92.7%	1,581 / 1,705
slack_app	███████████████████░ 92.8%	12,850 / 13,847
surveys	███████████████████░ 93.1%	6,200 / 6,660
mcp_registry	███████████████████░ 93.2%	1,471 / 1,578
stamphog	███████████████████░ 93.4%	6,543 / 7,009
web_analytics	███████████████████░ 93.4%	19,682 / 21,069
mcp_store	███████████████████░ 93.5%	8,203 / 8,777
context_layer	███████████████████░ 93.5%	2,683 / 2,870
reminders	███████████████████░ 93.6%	482 / 515
posthog_ai	███████████████████░ 93.7%	1,416 / 1,512
ai_observability	███████████████████░ 93.8%	18,659 / 19,888
wizard	███████████████████░ 93.8%	5,371 / 5,724
approvals	███████████████████░ 93.9%	3,575 / 3,808
billing_alerts	███████████████████░ 94.1%	2,079 / 2,210
marketing_analytics	███████████████████░ 94.2%	17,559 / 18,631
endpoints	███████████████████░ 94.2%	9,094 / 9,649
review_hog	███████████████████░ 94.3%	10,214 / 10,826
tracing	███████████████████░ 94.5%	2,732 / 2,891
workflows	███████████████████░ 94.8%	12,015 / 12,678
growth	███████████████████░ 94.9%	8,440 / 8,895
customer_analytics	███████████████████░ 95.0%	20,009 / 21,068
legal_documents	███████████████████░ 95.2%	2,339 / 2,458
annotations	███████████████████░ 95.3%	810 / 850
actions	███████████████████░ 95.4%	755 / 791
replay_vision	███████████████████░ 95.6%	23,313 / 24,396
skills	███████████████████░ 95.6%	5,806 / 6,073
product_analytics	███████████████████░ 95.8%	28,676 / 29,941
access_control	███████████████████░ 95.8%	6,378 / 6,659
feature_flags	███████████████████░ 95.8%	20,848 / 21,755
messaging	███████████████████░ 95.9%	3,680 / 3,839
logs	███████████████████░ 96.0%	14,099 / 14,681
experiments	███████████████████░ 96.2%	30,882 / 32,100
autoresearch	███████████████████░ 96.3%	2,815 / 2,923
revenue_analytics	███████████████████░ 96.3%	1,841 / 1,911
user_interviews	███████████████████░ 96.5%	2,656 / 2,752
warehouse_sources	███████████████████░ 97.2%	413,853 / 425,794
data_quality	████████████████████ 97.6%	4,234 / 4,340
analytics_platform	████████████████████ 98.2%	2,386 / 2,430
metrics	████████████████████ 98.3%	3,687 / 3,752
pulse	████████████████████ 98.4%	2,028 / 2,060
data_catalog	████████████████████ 98.5%	3,410 / 3,463
live_debugger	████████████████████ 99.2%	626 / 631
field_notes	████████████████████ 99.4%	172 / 173
ai_gateway	████████████████████ 100.0%	12 / 12

Report-only. Patch coverage = changed backend lines covered vs origin/master. Sorted lowest first.
Known gaps: lines covered only by Temporal tests show as uncovered; core line numbers may drift if master changed the same file.

ℹ️ Docs preview — preview build triggered

Docs from this PR will be published at posthog.com.

Project	Preview	Updated (UTC)
posthog.com	Open preview	Sep 10, 2026, 5:03 PM

The preview should be ready in about 10 minutes. Open the preview at /handbook/engineering/.

✅ Hobby preview — passed

Hobby deployment smoke test passed successfully.

---

_{Run 34508240602}

[trunk-io]

   

View Full Report ↗︎ ⋅ Docs

[rnegron]

do we need x86_64-darwin support?

[pr-assigner-resolver-posthog]

👀 Auto-assigned reviewers

These soft owners were skipped because they only have minor changes here. Nothing blocks merge, so self-assign if you'd like a look:

• @PostHog/team-ai-gateway (.github/owners.yaml, owners.yaml)
• @PostHog/team-ai-observability (owners.yaml)

Soft owners come from each directory's owners.yaml and each product's product.yaml (resolved nearest-file-wins). The locator after each owner is the file that decided it. Generated files and lockfiles are ignored when deciding ownership.

[greptile-apps]

Prompt To Fix All With AI

### Issue 1
bin/check_uv_python_compatibility.py:145
**New checks can be skipped**

The checker now reads `.flox/env/manifest.lock` and scans `.depot/workflows/*.yml`, but changes limited to either source do not trigger Python CI. As a result, lock-only or Depot-only version drift can merge without this compatibility validation. Add both paths to the Python CI trigger.

---

For each issue above, determine whether it is valid and should be fixed. If so, fix it directly.

_{Reviews (1): Last reviewed commit: "refactor(tooling): check flox uv coverag..." | Re-trigger Greptile}

[stamphog]

Not approved yet — waiting on the conditions below.

Re-add the stamphog label to request another review once you have addressed this.

Gates denied this as CI/toolchain-pin territory (deny-list hit on deps_toolchain and infra_cicd, oversized, cross-team) and there is no independent approving review — only a 👍 reaction and an unresolved question about Intel Mac support — so it needs human sign-off before merge.

• 👍 on the PR from greptile-apps[bot].
• Gates denied: touches CI/deploy workflow files and toolchain version pins across 53 files, exceeding auto-review size/tier limits.
• No approving review; only a 👍 reaction and an unresolved inline question from the author about x86_64-darwin support.
• Cross-team change (ai-gateway, ai-observability, posthog-desktop files touched) without those teams' sign-off.

Gate mechanics and policy version

Gate		Result
prerequisites	✓	all clear
deny-list	✗	matches: deps_toolchain, infra_cicd
size	✗	too large for auto-review (50F substantive in global — ceiling is 30F; 290L, 50F total, 462L/53F incl. docs/generated/snapshots)
tier	✗	classified as T2-never: T2-never (462L, 53F, cross-cutting, chore)
stamphog 2.0.0b4		.stamphog/policy.yml @ 47a3803 · reviewed head 47a3803

[gantoine]

nice
wonder if there's an equivalent to .python_version for uv?

[deployment-status-posthog]

Deploy status

Environment	Status	Deployed At	Workflow
dev	✅ Deployed	2026-09-10 20:02 UTC	Run
prod-us	✅ Deployed	2026-09-10 20:13 UTC	Run
prod-eu	✅ Deployed	2026-09-10 20:17 UTC	Run