color-design-advisor

name	color-design-advisor
description	Get visual color-design feedback on the minimap palette from Gemini. Builds the render_active_cue example, takes a screenshot, reads the current blend constants, then delegates to Gemini's tabmap-color-advisor skill for analysis and suggestions. Use when tweaking ACTIVE_UNFOCUSED_BLEND or INACTIVE_LABEL_BLEND and wanting an outside visual opinion.
allowed-tools	["Bash(cargo build*)","Bash(vhs*)","Bash(grep*)","Bash(mktemp*)","Bash(rm*)","Bash(gemini*)","Read(src/minimap.rs)"]

color-design-advisor

Orchestrates: build → screenshot → ask Gemini → show result.

Step 1 — Build the visual harness

Detect the host target triple at runtime:

HOST_TRIPLE="$(rustc -vV | awk '/host:/ {print $2}')"
CARGO_BUILD_TARGET="$HOST_TRIPLE" cargo build --example render_active_cue -q

If it fails, report the error and stop.

Step 2 — Generate a PNG screenshot

Write a VHS tape to a tempfile and run it. Use absolute paths (expand the repo root yourself before writing):

Output /tmp/tabmap-color-check-dummy.gif
Set Shell "bash"
Set Width 920
Set Height 220
Set Theme "TokyoNight"
Hide
Type "export COLORTERM=truecolor"
Enter
Sleep 100ms
Type "<absolute-path-to-binary>"
Enter
Sleep 2s
Show
Sleep 500ms
Screenshot /tmp/tabmap-color-check.png
Sleep 100ms

Binary path: <repo-root>/target/<host-triple>/debug/examples/render_active_cue

Step 3 — Read current constants

From src/minimap.rs, extract:

• ACTIVE_UNFOCUSED_BLEND value — may be absent if the three-level brightness feature has not been implemented yet; use empty string if missing
• INACTIVE_LABEL_BLEND value

Step 4 — Call Gemini

gemini -p "tabmap-color-check: image=/tmp/tabmap-color-check.png ACTIVE_UNFOCUSED_BLEND=<n> INACTIVE_LABEL_BLEND=<n>"

Pass the value of ACTIVE_UNFOCUSED_BLEND as empty if the constant is absent. This triggers the tabmap-color-advisor Gemini skill. If the output does NOT contain ASSESSMENT:, the skill may not have loaded — confirm Gemini was launched from inside this repo, since the project skill at .gemini/skills/tabmap-color-advisor/ is only discovered when the cwd is the project (no global install needed).

Step 5 — Present the result

Show Gemini's full output. Before offering to apply a suggested constant change, verify that the constant actually exists in src/minimap.rs. If it doesn't:

• Tell the user the constant is not yet wired into the renderer
• Offer to implement it (this requires a code change beyond editing a constant)

If the constant does exist, offer to update its value in src/minimap.rs.

Install note

No install step is needed. The Gemini skill lives at .gemini/skills/tabmap-color-advisor/ in this repo and Gemini discovers it automatically when launched with this repo as the working directory.

Do not symlink or copy it into ~/.gemini/skills/ — this skill is project-specific (it knows the tabmap minimap's exact render model and blend constants), so a global install would surface it in every unrelated Gemini session.