Development

Programming, frameworks, implementation, frontend, backend, and app development

skills in category: 65,728
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Internal Shipped ReferenceAReviews a shipped-corpus edit for a reference that resolves only in this checkout and reads as portable, the one form the reference gate cannot classify by pattern. Use before shipping a change under claude/, docs/, governance/, scripts/, standards/, or tooling/, routed here by `598-authoring-layout.md`. Do NOT use for a pull request number, a commit sha, a resolvable `docs/<name>.md` path, a phase label, or a numbered rule path, which `canon gate run`'s shipped-references stage already class...developmentgoVotes: 0GitHub stars: 2
Github LabelsAGitHub label taxonomy for kookr-ai/kookr. Use when creating issues, PRs, or triaging work to apply correct labels.developmentgobashVotes: 0GitHub stars: 5
Automation DesignADesign, simplify, and improve autonomous workflows, supervisors, scheduled jobs, and recovery loops across projects. Use when automation needs repeated human intervention, reports activity without results, or tries a new recovery approach. Record outcomes and refine this skill from evidence.developmentgoVotes: 0GitHub stars: 5
Building LoopsABuild a Loop for PostHog Desktop: a workflow that creates an AI task each time its trigger fires, optionally followed by a Slack or email notification with the task's result. Use when asked to create, set up, or change a loop, a recurring agent, a scheduled task, or an automation that runs an AI task when a GitHub, Slack, or PostHog event happens. Covers the exact graph, trigger configs, schedule presets, the notify step, structured output, and the test-run steps.developmentgitapiVotes: 0GitHub stars: 40,048
Creating SurveysACreates and launches PostHog surveys through MCP, including NPS/CSAT popovers, hosted feedback forms, and headless surveys. Guides survey type selection, audience targeting, draft review, and launch readiness. Use when asked to create a survey or form, or before calling survey-create. For investigating an existing survey's delivery or responses, use debugging-surveys instead.developmentgodebuggingVotes: 0GitHub stars: 40,048
ScoutAWatches AEO citation-check results in system.aeo_citation_checks and files an inbox report when a domain's citation rate on an answer engine drops or spikes versus its baseline, or when the citation runner itself is failing.developmentpythonrustVotes: 0GitHub stars: 40,048
Working With ChartsAGuides consumers of @posthog/quill-charts through chart selection, data, themes, sizing, and composition. Use when adding or changing a chart built with the package, including its axes, tooltips, legend, overlays, or interactions. Links to package examples and API docs. Does not cover product integration or library internals.developmenttestingapiVotes: 0GitHub stars: 40,048
Testing Mcp Tools LocallyASet up the local dev environment, seed data, and API keys to test the staff-only managed migrations MCP tools (managed-migrations-support-list, managed-migrations-support-get) end to end. Use when testing batch import support tooling, debugging MCP tool responses or discovery (tools not appearing), or verifying the support API before deploying. Covers the discovery gate: hidden scope, is_staff, user:read, and why wildcard keys and OAuth never work.developmentpythonrustVotes: 0GitHub stars: 40,048
Setting Up Support Slack LocallyAConnect a real Slack workspace to local PostHog Conversations (the SupportHog Slack app) so Slack messages become support tickets and replies post back. Use when the user wants to test the conversations Slack integration locally, hits "Support Slack OAuth client ID is not configured", gets a white screen or "Network error" on the OAuth callback, or asks how to set SUPPORT_SLACK_APP_CLIENT_ID / a tunnel for supporthog Slack events. Covers the Slack app + scopes, the SUPPORT_SLACK_* dynamic set...developmentgobashVotes: 0GitHub stars: 40,048
Routing Outbound Api CallsAUse before adding or changing Python code that calls a third-party HTTP API from PostHog (a vendor REST call, a vendor SDK client, a scraping or enrichment service), and before adding or changing a domain under posthog/egress/: its budget, priority lanes, identity, metrics, or rate-limit headers. Routes the call to an existing egress domain, a new gated domain, a record-only domain, or no domain at all, names the reference domain to copy, and lists the tests that catch a missing priority rese...developmentjavascriptpythonVotes: 0GitHub stars: 40,048
Reviewing With CoderabbitARun a CodeRabbit review over the branch from the terminal, with the `coderabbit` CLI, and record the pass in the PR description. Before `gh pr create` or a requested branch review, first check `POSTHOG_TASK_RUN_ID` and `CI`: a cloud or CI task skips this skill without a CLI probe or user message. Otherwise, use this skill to check `cr` and its authentication, and offer setup or skip when a person can answer. Run the review once per branch. Never substitute an agent review. Trigger terms: code...developmentgosqlVotes: 0GitHub stars: 40,048
Querying Production Databases Via MetabaseARuns read-only production database analysis through PostHog's internal Metabase instances. Use for ClickHouse query logs, slow query cost, Postgres query plans, index selection, or tenant-size analysis. Covers US and EU database discovery, SSO login through `hogli`, safe query rules, and query patterns for both engines.developmentpythongoVotes: 0GitHub stars: 40,048
Profiling Slow Api EndpointsAProfiles slow PostHog API endpoints when the main cost is in Postgres or Python. Use when a screen, picker, or list is slow; a Django endpoint has high tail latency; a query plan changes with tenant size; or a proposed database fix needs production evidence. Covers APM traces, safe production EXPLAIN, representative measurements, implementation choices, tests, rollout, and post-deploy verification. For ClickHouse or HogQL latency, use `optimizing-clickhouse-and-hogql-queries` instead.developmentpythongoVotes: 0GitHub stars: 40,048
Organizing Conversations CodeAFile layout for the conversations product. Use when adding, moving, renaming, or reviewing files under products/conversations/ — especially frontend components, scenes, helpers, and tests. Conversations React components live in their own folder under products/conversations/frontend/components/, never as loose files in components/ or at the frontend root. Expand this skill as more conversations layout rules land.developmentgoreactVotes: 0GitHub stars: 40,048
Improving Mcp ToolsARun an improve-my-MCP campaign: an autoresearch-style loop that measures the MCP agent experience with the eval harness, picks the highest-impact tool problem from production data, makes one bounded fix, and keeps it only if before/after scores improve. Use when asked to "improve my MCP", run an MCP improvement campaign, fix tool discoverability or descriptions based on evidence, or prepare an eval-backed PR for a tool change. Every shipped change must carry eval evidence; guardrails below ar...developmentnoderailsVotes: 0GitHub stars: 40,048
Editing Agents MdADecide whether a rule belongs in an AGENTS.md / CLAUDE.md file, and write it so it holds. Use before adding, editing, or removing any instruction in a root or nested AGENTS.md, when a convention keeps getting broken and someone proposes documenting it, when reviewing a diff that touches one, or when a file has grown and needs a trim. Carries the enforcement-tag convention (`[lint: <id>]` / `[review]`), the six configuration smells to check against, and the size budget. Trigger terms: AGENTS.m...developmentrustgoVotes: 0GitHub stars: 40,048
Developing SubscriptionsAGuides PostHog engineers through subscription product changes. Use when changing subscription resource types, destinations, schedules, delivery workflows, retry or automatic disable behavior, permissions, limits, AI summaries, AI prompt reports, delivery history, subscription APIs, MCP tools, or subscription management UI. Not for configuring an existing subscription through MCP.developmentgodjangoVotes: 0GitHub stars: 40,048
Depot CiAConfigures and manages Depot CI, a drop-in replacement for GitHub Actions that runs workflows entirely within Depot. Use when migrating GitHub Actions workflows to Depot CI, running `depot ci migrate`, managing Depot CI secrets and variables, running workflows with `depot ci run`, debugging Depot CI runs with `depot ci run list`, `depot ci status`, `depot ci logs`, `depot ci diagnose`, or `depot ci ssh`, inspecting test results with `depot tests` or run artifacts with `depot ci artifacts`, ch...developmentjavascriptrustVotes: 0GitHub stars: 40,048
Debugging Signals PipelineBDebug the signals pipeline locally end-to-end. Covers emitting test signals from fixtures, monitoring Temporal workflows via the REST API, reading sandbox agent logs from object storage, inspecting Docker sandbox containers, and diagnosing common failures (stale ClickHouse embeddings, agentsh network denials, inactivity timeouts). Use when a signal isn't reaching the inbox, a signal-report-summary workflow fails, or a sandbox task run times out.developmentpythongoVotes: 0GitHub stars: 40,048
Debugging Mcp AnalyticsADebug, support, and build PostHog MCP Analytics — product analytics for MCP servers (the `@posthog/mcp` and `posthog.mcp` SDKs plus the mcp_analytics product). Use when MCP analytics data looks wrong or missing ("events aren't showing", "intent clusters are empty", "sessions are missing", "per-tool numbers look wrong"), when writing queries over `$mcp_*` events by hand, or when doing feature work on the SDKs, the dashboard and its query runners, the self-instrumented MCP server, the `wizard m...developmenttypescriptpythonVotes: 0GitHub stars: 40,048
Authenticating To ClickhouseAAuthenticate a new or changed service to ClickHouse with the rotating ch-podauth ServiceAccount token instead of a static password. Use when adding a service, sidecar, or container that reads or writes ClickHouse, adding a new ClickHouseUser, or hand-building a ClickHouse pool or client for a custom timeout or setting. Covers the token-aware default path (sync_execute, get_client), the rule that a custom pool must pass credential_provider or it silently stays on the static password, wiring th...developmentVotes: 0GitHub stars: 40,048
Analyzing Experiment Precompute CanaryAAnalyze the experiment precompute result-consistency canary across prod-US and prod-EU, deep-dive any issues, and produce an actionable report. Sweeps the canary's Prometheus health gauges in both regions, and when anything is unhealthy pulls the structured divergence/failure logs from Loki to reconstruct exactly which (team, experiment, metric) went wrong, by how much, and which class of divergence it is (stability vs correctness, and for correctness whether exposure counts or only values di...developmentrustgoVotes: 0GitHub stars: 40,048
Adding Inbound WebhooksAUse when adding a webhook endpoint for a third party that sends to PostHog, adding an inbound webhook consumer for a provider that already has an endpoint, or migrating a hand-rolled hmac verifier that the `inbound-webhooks-go-through-ingress` semgrep rule flags. Covers the two jobs separately: a consumer in `products/<product>/backend/webhook_consumers.py`, and a provider incarnation under `posthog/ingress/<provider>/` wired with `build_webhook_view()`. Carries the rules that are easy to get...developmentpythongoVotes: 0GitHub stars: 40,048
Adding Activity LoggingAAdds or changes activity logging (the audit trail) for a Django model in PostHog. Use when a model's writes must show in the Activity side panel or the advanced activity logs, when adding ModelActivityMixin, an ActivityScope, a model_activity_signal receiver, an activity describer, or field exclusions, when auditing which write paths of a model are logged, or when a change is missing from the activity log. Covers the receiver-module convention, writes the signal cannot see (QuerySet.update, b...developmentgoshellVotes: 0GitHub stars: 40,048