Setup: Compose copy-trader

This skill makes the cloned copy-trader example runnable under the user's own Goldsky account. Two moving parts: a Turbo pipeline (pipeline/polymarket-ctf-events.yaml) that indexes Polymarket OrderFilled events on Polygon and webhooks them into Compose, and a Compose app (compose.yaml) with three tasks — copy_trade (http, mirrors each fill), setup_approvals (http, one-time), and redeem (cron every 5 min).

This is the most complex example. Do not skip any preflight or ordering step.

Non-negotiables

• Never run goldsky compose deploy, goldsky turbo apply, goldsky secret create, goldsky compose secret set, git push, or gh repo create without showing the exact command first and getting explicit confirmation.
• WATCHED_WALLETS must be identical in two places: the WATCHED_WALLETS: env var inside env.cloud: of compose.yaml, AND the maker IN (...) / taker IN (...) lists inside the watched_fills SQL transform of pipeline/polymarket-ctf-events.yaml. Mismatch = fills get indexed but not mirrored, or vice versa. Triple-check the addresses are lowercased, comma-separated, and identical in casing.
• Order of operations matters: deploy the Compose app first, because the pipeline YAML's webhook URL contains the Compose app name. If you deploy the pipeline before the app exists (or with a stale app name), every webhook will 404.
• The PRIVATE_KEY secret is a real funded EOA on Polygon mainnet. This is not a testnet. Treat the key with care; do not print it, commit it, or log it. Polymarket CLOB orders are signed as this EOA — orders execute for real money.
• US geo-blocking: Polymarket's CLOB API blocks US IPs. Compose hosts may be in the US. The default CLOB_HOST is a shared Fly.io proxy in the EU. For production, the user should deploy their own proxy (link in README).

Variable handling for agents

When this skill says $FOO, capture the literal value from the prior command's output and substitute it directly into the next command. Do not rely on shell variables persisting between separate Bash tool invocations — each invocation gets a fresh shell with no env carryover from earlier commands.

Preflight