fix(openclaw): drop unsupported --force from linked plugin install

[Alexgodoroja]

What happens now

npx [email protected] attach --openclaw fails outright:

pilot-mcp: Command failed: openclaw plugins install --link --force ~/.pilot/integrations/openclaw-policy
--force is not supported with --link. Linked plugins point at the source path directly;
remove --force and re-run openclaw plugins install --link <path>.

src/setup/harnesses/openclaw.js passes both flags, and OpenClaw treats them as mutually
exclusive — a linked plugin points at the source path, so there is no copy to overwrite.

Why it's worse than one failed command

configure() runs install, enable and inspect inside a single try, so the throw on the
first step means none of them run and pilot-policy is never registered. The cpSync on
line 22 has already populated ~/.pilot/integrations/openclaw-policy by that point, so the
user is left with plugin files on disk and nothing installed against them — plugins list
shows no pilot-policy, which reads like the copy silently did nothing.

Fix

Drop --force. It was redundant anyway: a linked install points at installedPlugin, and
cpSync(..., { force: true }) refreshes those files on every run, so re-attaching stays
idempotent without it.

Why CI didn't catch it

The test stubbed openclaw with a shell script that logged argv and always exited 0, so it
happily accepted a flag pair the real CLI refuses, and assert.match(calls, /--link\n--force/)
actively pinned the broken behaviour. The stub now mirrors the real CLI and rejects the
combination; reintroducing --force fails the test (confirmed by re-adding it locally).

Verification

Against OpenClaw 2026.7.1-2 on macOS, all three steps now succeed and
plugins inspect pilot-policy --json reports status: "loaded", enabled: true.

node --test test/native-harness-setup.test.js → 8/8 pass. npm run lint clean.

Full npm test is 55 pass / 7 fail, but that failure set is identical on unmodified main
(test/attach.test.js, harness-config-contracts, hermes-setup, manifest, two OpenClaw
plugin hook tests, and the stdio initialize smoke test). All pre-existing and untouched here.