fix: prevent skill load failure when data-designer CLI is not installed

[johnnygreco]

Summary

• Removes the ! backtick command substitution from SKILL.md that resolved the data-designer CLI path at skill load time — if the CLI wasn't installed, this could cause the skill to fail to load entirely
• Adds a Resolve CLI command step as step 1 in both workflows (interactive and autopilot) where the agent runs the lookup command itself and evaluates the result
• Uses a CLI_NOT_FOUND sentinel (via || echo CLI_NOT_FOUND) so the command always exits 0 — this prevents the agent from going into error-fixing mode and instead keeps it following the workflow instructions
• Updates the Troubleshooting section to ask the user for permission before creating a venv or installing packages, instead of attempting it automatically

[greptile-apps]

Greptile Summary

Moves data-designer CLI resolution from skill-load time (backtick substitution in SKILL.md) to workflow runtime, preventing the skill from failing to load entirely when the CLI is not installed. Both workflow files gain an explicit first step with a CLI_NOT_FOUND sentinel that ensures the shell command always exits 0, guiding the agent to prompt the user for permission rather than attempting autonomous installation.

Confidence Score: 5/5

Safe to merge — the fix correctly defers CLI resolution to runtime and all three files are updated consistently.

No P0 or P1 issues found. The shell command logic is verified correct: command -v exits 1 (not producing stderr) when the command is absent, the OR-chain falls through to the .venv check, and the final || echo CLI_NOT_FOUND guarantees exit 0 and a clear sentinel. The troubleshooting section now properly gates any installation on explicit user consent. All files are updated in sync.

No files require special attention.

Important Files Changed

Filename	Overview
skills/data-designer/SKILL.md	Removes backtick CLI substitution at skill-load time; Troubleshooting updated to ask user permission before creating a venv or installing packages
skills/data-designer/workflows/autopilot.md	Adds step 1 to resolve CLI path at runtime with CLI_NOT_FOUND sentinel; all subsequent steps renumbered
skills/data-designer/workflows/interactive.md	Adds identical CLI-resolution step 1 as autopilot.md; subsequent steps renumbered consistently

Sequence Diagram

sequenceDiagram
    participant Agent
    participant Shell
    participant User

    Agent->>Shell: command -v data-designer 2>/dev/null
    alt Found in system PATH
        Shell-->>Agent: /usr/local/bin/data-designer
        Agent->>Shell: data-designer agent context
    else Not in PATH
        Shell-->>Agent: (empty, exit 1)
        Agent->>Shell: test -x .venv/bin/data-designer && realpath ...
        alt Found in .venv
            Shell-->>Agent: .venv/bin/data-designer (resolved path)
            Agent->>Shell: .venv/bin/data-designer agent context
        else Not found anywhere
            Shell-->>Agent: CLI_NOT_FOUND
            Agent->>User: CLI not installed — would you like me to set up a venv?
        end
    end

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_{Reviews (6): Last reviewed commit: "Merge branch 'main' into johnny/fix/skil..." | Re-trigger Greptile}

[johnnygreco]

ran the benchmarks to confirm everything looks okay