feat: add data-warehouse-source-setup skill#157
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Agent playbook for the wizard's `warehouse` program: discover source fields via the PostHog MCP, collect credentials interactively (never reading .env values), validate and create in-CLI sources, and emit deep-link URLs for OAuth sources. Generates to skill id `data-warehouse-source-setup`.
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gewenyu99
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May 28, 2026
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Ship it! But please do test and tweak this on some projects, I have some suggestions that are educated guesses, but you should try on real projects and analyze the /tmp/posthog-wizard.log with an LLM to find where it succeeds/struggles
Reference wizard tools as mcp__wizard-tools__* and PostHog MCP tools as mcp__posthog-wizard__* so the agent invokes them by their real fully-qualified names, and drop the exec-style `info` instruction in favour of following the create tool's input schema.
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Summary
Adds the
data-warehouse-source-setupskill that powers the PostHog wizard's newwarehouseprogram (companion PR: PostHog/wizard#488).The wizard detects which data sources a project uses and passes them (kind + creation mode) into the agent prompt. This skill is the agent playbook for connecting them:
in-clisources (databases, API-key SaaS): discover required fields via the PostHog MCPexternal-data-sources-wizard, collect credentials in a single batchedwizard_ask(never reads.envvalues), validate/list tables viaexternal-data-sources-db-schema, then create withexternal-data-sources-create.deep-linksources (OAuth): emit the pre-fillednew-source?kind=URL for the user to finish in the app.[ABORT]reasons (No data source detected,Source creation failed) match the wizard's abort-case handling.docs-onlyskill; bundles the Postgres/MySQL/Snowflake/BigQuery/Stripe + sources-overview reference docs. Generates to skill iddata-warehouse-source-setup.Test plan
pnpm test:skills— 38/38 passdata-warehouse-source-setup, all template placeholders resolved, reference docs fetched)scan-prompt-injection.sh— PASSED🤖 Generated with Claude Code