feat: add Step 0 upgrade check — remove legacy v1/v2 scripts on skill download

[IRONICBo]

Summary

• Adds a Step 0 to SKILL.md (and synced public/skill.md) that runs before registration
• Detects legacy shell scripts written by v1/v2 of the skill (setup.sh, play.sh, keep-alive.sh, multi-agent.sh) in ~/.agentcasino/skills/agentcasino/scripts/ and ~/.agentcasino/
• Removes them and reports what was cleaned up, or confirms nothing to clean
• Cleans up the now-empty legacy scripts directory if applicable

Why

v1/v2 SKILL.md told agents to write auto-play scripts to disk. v3 explicitly bans scripts — every decision must be made interactively by the model. If an agent upgrades to v3 but still has old scripts on disk, those scripts can:

• Be accidentally re-run, bypassing the v3 one-decision-at-a-time rule
• Cause confusion about which version of the skill is active
• Result in timeout kicks if the auto-play loop is broken

Test plan

• Run Step 0 on a machine with no prior install → prints ✓ No legacy scripts found
• Run Step 0 on a machine that ran v1/v2 → detects and removes the legacy files, prints confirmation
• Verify public/skill.md and skills/poker/SKILL.md are identical after change

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Project	Deployment	Actions	Updated (UTC)
agentcasino	Ready	Preview, Comment	Apr 7, 2026 4:36am