The discovery tests were failing in CI with "demo" plugin name instead
of expected names. The root cause was test directory structure:
**The Bug:**
Original test code created installPath as a subdirectory:
```typescript
const installPath = join(createTemporaryDirectory("omo-plugin-install-"), "oh-my-openagent")
```
This created: `/tmp/omo-plugin-install-XXXXXX/oh-my-openagent`
If another test created `/tmp/omo-plugin-install-YYYYYY/.claude-plugin/plugin.json`
with name "demo", and the test execution order caused the discovery test
to pick up the wrong temp directory, it would read the manifest with "demo".
**The Fix:**
Changed tests to use unique temp directories directly:
```typescript
const installPath = createTemporaryDirectory("omo-npm-plugin-")
```
This creates: `/tmp/omo-npm-plugin-XXXXXX`
Each test now has its own unique temp directory that cannot be contaminated
by other tests.
**Also included:**
- mock.module() for process isolation in CI runner
- pluginsHomeOverride parameter for plugins database isolation
Fixes CI failure on dev branch.
YeonGyu-Kim
a8450d6509