M126 — ${CLAUDE_EFFORT} + /skills filter

#1540 — Pick an effort, see what each skill does

How the skills detect effort (CC 2.1.120+)

# Read env first (CC 2.1.120+), then check explicit override
EFFORT = os.environ.get("CLAUDE_EFFORT")  # "low" | "medium" | "high" | "xhigh" | None
for token in "$ARGUMENTS".split():
    if token.startswith("--effort="):
        EFFORT = token.split("=", 1)[1]   # explicit override wins
EFFORT = EFFORT or "high"  # default when CC < 2.1.120 and no flag

Backwards-compatible: on CC < 2.1.120 the env var is unset, so the explicit --effort=... token is the only path. /ork:doctor warns when xhigh is requested without Opus 4.7.

#1546 — Type-to-filter the native /skills picker (CC 2.1.121)

Decision split