PostHog analytics

PostHog analytics in the web client, disabled when no key is set so tests, CI, and sandboxes need no account, with a typed event catalog and a pre-init buffer.

Category: vendor

In your existing repository

Ask your agent to check compatibility, follow this fragment’s brief, and verify the resulting project. What happens next

Applies to:: astro-blog, astro-fullstack, cloudflare-react-router, python-react, react-router

Add to your project

Paste the prompt into the coding agent working on your project.

View prompt

Add the posthog fragment to this existing repository. 1. Run npx @steamfield/stacks show posthog --json and check that it fits the project. If it does not, explain why before changing files. 2. Run npx @steamfield/stacks add posthog and follow the brief it prints. 3. In this repository, run npx @steamfield/stacks verify. Fix failures without weakening or skipping verification steps. 4. Summarize what changed and the verification result. Quote published stats only when they are available, including their interval and sample size. The stacks docs, written for agents, are at https://stacks.steamfield.io/llms.txt.

Or use the terminal

npx @steamfield/stacks add posthog

Verify steps
Step	Phase	Layer	Command

No additional verify steps declared. Run the project’s existing verification after applying the brief.

Use with a new stack

Starting fresh instead? These stacks support this fragment.

astro-blogdefault
npx @steamfield/stacks new astro-blog
astro-fullstackoptional
npx @steamfield/stacks new astro-fullstack --with posthog
python-reactdefault
npx @steamfield/stacks new python-react
cloudflare-react-routeroptional
npx @steamfield/stacks new cloudflare-react-router --with posthog
react-routeroptional
npx @steamfield/stacks new react-router --with posthog

Alternatives in vendor

OpenRouter LLM provider
OpenRouter as the LLM provider for a TypeScript project: an optional API key, model discovery with a ten-minute cache, routing settings, bounded retries with safe upstream errors, a scriptable local stub server for tests, and an eval report format with a dry-run checker.
Also applies to: react-router

Files

This fragment supplies instructions rather than project files.

Usage

Among stacks projects in the 28 days through 30 Oct 2026: 6,395 projects; 80% reached a green verify (79–81%, n=4,375).

Weekly projects by stack

Projects whose final fragment set included this fragment, grouped by stack.

12 weeksAvailable history

astro-blog
python-react
react-router

astro-blog
python-react
react-router

Stacks projects per UTC week through 30 Oct 2026. Published stack counts only.

Data table

Week ending	Stack	Projects
5 Jul 2026	astro-blog	95
12 Jul 2026	astro-blog	180
19 Jul 2026	astro-blog	270
26 Jul 2026	astro-blog	365
2 Aug 2026	astro-blog	340
9 Aug 2026	astro-blog	355
16 Aug 2026	astro-blog	400
23 Aug 2026	astro-blog	415
30 Aug 2026	astro-blog	450
6 Sept 2026	astro-blog	450
13 Sept 2026	astro-blog	430
20 Sept 2026	astro-blog	595
27 Sept 2026	astro-blog	570
4 Oct 2026	astro-blog	545
11 Oct 2026	astro-blog	600
18 Oct 2026	astro-blog	635
25 Oct 2026	astro-blog	645
5 Jul 2026	python-react	355
12 Jul 2026	python-react	605
19 Jul 2026	python-react	835
26 Jul 2026	python-react	1,020
2 Aug 2026	python-react	1,065
9 Aug 2026	python-react	1,215
16 Aug 2026	python-react	1,275
23 Aug 2026	python-react	1,320
30 Aug 2026	python-react	1,415
6 Sept 2026	python-react	1,490
13 Sept 2026	python-react	1,550
20 Sept 2026	python-react	1,605
27 Sept 2026	python-react	1,775
4 Oct 2026	python-react	1,865
11 Oct 2026	python-react	1,430
18 Oct 2026	python-react	1,190
25 Oct 2026	python-react	875
5 Jul 2026	react-router	–
12 Jul 2026	react-router	–
19 Jul 2026	react-router	–
26 Jul 2026	react-router	–
2 Aug 2026	react-router	–
9 Aug 2026	react-router	–
16 Aug 2026	react-router	–
23 Aug 2026	react-router	–
30 Aug 2026	react-router	–
6 Sept 2026	react-router	–
13 Sept 2026	react-router	–
20 Sept 2026	react-router	–
27 Sept 2026	react-router	–
4 Oct 2026	react-router	–
11 Oct 2026	react-router	–
18 Oct 2026	react-router	–
25 Oct 2026	react-router	–

By stack

How often this fragment stays in a default composition, or gets attached as an option.

astro-blog

Default · kept91%

2,345 projects including the fragment

python-react

Default · kept92%

4,045 projects including the fragment

react-router

Optional · attached21%

5 projects including the fragment

Stacks projects · 28 days through 30 Oct 2026. Counts rounded to 5.

Data table

Stack	Projects	Role	Share
astro-blog	2,345	Default · kept	91%
python-react	4,045	Default · kept	92%
react-router	5	Optional · attached	21%

Green rate with and without it

This compares projects; it isn't an effect of the fragment.

Not enough runs in this breakdown yet.

Stacks projects · 28 days through 30 Oct 2026. Counts rounded to 5.

Often used with

Co-occurrence above the baseline, within a stack. Required fragment pairs are excluded.

Not enough runs in this breakdown yet.

Stacks projects · 28 days through 30 Oct 2026. Counts rounded to 5.

Computed 31 Oct 2026, through 30 Oct 2026. Numbers describe stacks projects, not the ecosystem.