Dj Architecture
dvf/opinionated-django
Implement a Django feature following the opinionated architecture — prefixed ULID IDs, repository pattern, Pydantic DTOs, svcs service locator, project-scoped django-ninja API, Celery reliable…
Keep heavy imports off the django.setup() path that every process (web, celery, temporal, migrate, shell, CI) pays for.
Install Django Startup Time
$ npx skills add PostHog/posthog --skill django-startup-time -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install PostHog/posthog django-startup-time --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/django-startup-time .claude/skills/django-startup-time && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "django-startup-time" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/django-startup-time into .claude/skills/django-startup-time/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "django-startup-time", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/PostHog/posthog/tree/master/.agents/skills/django-startup-timeType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add PostHog/posthog --skill django-startup-time -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install PostHog/posthog django-startup-time --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/django-startup-time .agents/skills/django-startup-time && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "django-startup-time" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/django-startup-time into .agents/skills/django-startup-time/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "django-startup-time", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add PostHog/posthog --skill django-startup-time -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install PostHog/posthog django-startup-time --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/django-startup-time .cursor/skills/django-startup-time && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "django-startup-time" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/django-startup-time into .cursor/skills/django-startup-time/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "django-startup-time", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/PostHog/posthog.git --path .agents/skills/django-startup-time--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add PostHog/posthog --skill django-startup-time -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install PostHog/posthog django-startup-time --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/django-startup-time .gemini/skills/django-startup-time && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "django-startup-time" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/django-startup-time into .gemini/skills/django-startup-time/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "django-startup-time", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install PostHog/posthog django-startup-timeInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add PostHog/posthog --skill django-startup-time -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/django-startup-time .github/skills/django-startup-time && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "django-startup-time" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/django-startup-time into .github/skills/django-startup-time/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "django-startup-time", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add PostHog/posthog --skill django-startup-time -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install PostHog/posthog django-startup-time --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/django-startup-time .opencode/skills/django-startup-time && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "django-startup-time" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/django-startup-time into .opencode/skills/django-startup-time/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "django-startup-time", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
django-startup-time- GitHub stars
- 40k
- Token cost
- ~1.4k tokens
- SKILL.md length
- 669 words
- Files
- 1
- Skills in repo
- 252
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Keep heavy imports off the django.setup() path that every process (web, celery, temporal, migrate, shell, CI) pays for.
- Touching AppConfig.ready()
- SKILL.md covers Defaults when adding backend… and Traps to check before you commit
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Wiring signal receivers
What it does
Django Startup Time is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Keep heavy imports off the django.setup() path that every process (web, celery, temporal, migrate, shell, CI) pays for. Use when touching AppConfig.ready(), wiring signal receivers, editing the lazy API router (posthog/api/restrouter.py or its init.py shim), deferring a heavy import or profiling import time (importtime, hothog), when the startup-import-budget guard fails, or when merging master into a long-lived branch that made the router lazy.
Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Backend & APIs, covering Backend development and Background jobs. It works with Django and PostHog. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…
When your agent uses it
- Touching AppConfig.ready()
- Wiring signal receivers
- Editing the lazy API router (posthog/api/restrouter.py
- Its init.py shim)
Example prompts
- “/django-startup-time”
What it can do on your machine
Read from SKILL.md and the folder at commit 10f9ad7. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
github.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Django Startup Time loads about 1.4k tokens when it runs. Until then it costs about 119 tokens; SKILL.md has 669 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 669 words (~1,369 tokens).
“Full background — the four mechanisms (lazy router, model registration, receiver wiring, boot GC window), the regression guards, how to add code without regressing them, how to measure, and the detailed trap write-ups: docs/internal/django-startup-time.md. That doc is the single source…”
- name
- django-startup-time
Files
Just SKILL.md in .agents/skills/django-startup-time of PostHog/posthog.
Open the folder on GitHubat commit 10f9ad7
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Django Startup Time next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Django Startup Time this skillPostHog/posthog | 40k | — | ~1.4k | Automated safety check: Pass | Custom licence | |
| Dj Architecturedvf/opinionated-django | 109 | — | ~4k | Automated safety check: Notes | MIT | |
| Django Celery Expertvintasoftware/django-ai-plugins | 151 | — | ~1.2k | Automated safety check: Pass | None | |
| Sentry Python SDKgetsentry/sentry-for-ai | 268 | — | ~4.1k | Automated safety check: Pass | Apache-2.0 | |
| Django Prodavila7/claude-code-templates | 32k | 8 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Dj Servicesdvf/opinionated-django | 109 | — | ~3k | Automated safety check: Notes | MIT |
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Related
Categories
Questions about Django Startup Time
What does Django Startup Time do?
Keep heavy imports off the django.setup() path that every process (web, celery, temporal, migrate, shell, CI) pays for. Django Startup Time is an agent skill from PostHog/posthog, published by the product's own GitHub organization.setup() path that every process (web, celery, temporal, migrate, shell, CI) pays for.
When should I use Django Startup Time?
Django Startup Time fits situations like: touching AppConfig.ready(); wiring signal receivers; editing the lazy API router (posthog/api/restrouter.py; its init.py shim).
How do I install Django Startup Time in Claude Code?
Run `npx skills add PostHog/posthog --skill django-startup-time -a claude-code`. Or copy the skill folder (.agents/skills/django-startup-time in PostHog/posthog) into .claude/skills/django-startup-time in your project. Claude Code loads it when a task matches its description.
How do I install Django Startup Time in Codex?
Run `npx skills add PostHog/posthog --skill django-startup-time -a codex`. Or copy the skill folder (.agents/skills/django-startup-time in PostHog/posthog) into .agents/skills/django-startup-time in your project. Codex loads it when a task matches its description.
Can I use Django Startup Time in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add PostHog/posthog --skill django-startup-time -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/django-startup-time, .gemini/skills/django-startup-time, .github/skills/django-startup-time and .opencode/skills/django-startup-time in your project.
What does Django Startup Time need to run?
SKILL.md names no scripts, command-line tools or credentials: Django Startup Time is instructions for the agent only.
Does Django Startup Time access the network?
SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.
Is Django Startup Time safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Django Startup Time use?
Django Startup Time has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Django Startup Time use?
About 1.4k tokens (SKILL.md is roughly 5.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Django Startup Time?
Skills that share tags, products or a category with Django Startup Time: Dj Architecture (dvf/opinionated-django, 109 stars), Django Celery Expert (vintasoftware/django-ai-plugins, 151 stars), Sentry Python SDK (getsentry/sentry-for-ai, 268 stars) and Django Pro (davila7/claude-code-templates, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Django Startup Time?
PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,182 GitHub stars. The repository holds 252 skills in this directory. The repository was last updated on October 8, 2026.
Source: PostHog/posthog on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.