v0.9.20

- Fix: the graphify-first search nudge now fires on Claude Code's dedicated **Grep tool**, not just Bash (#1986, thanks @mdshzb04). The installed PreToolUse hook only matched `Bash`, so a `Grep` tool call (whose `tool_input` is `{pattern, path, glob, ...}`, not `{command}`) slipped through and never got nudged toward `graphify query`. The matcher is now `Bash|Grep` and the search guard recognizes the Grep shape; it stays nudge-only (never the strict deny), and the uninstall filters + #1840 gating are unchanged.
- Fix: installed hook commands now use forward slashes in the graphify exe path so Git Bash doesn't strip them (#1987, thanks @varuntej07). On Windows the resolved exe path had backslashes, which Git Bash (how Claude Code shells hooks) treats as escapes and drops, breaking the hook with "command not found". `_resolve_graphify_exe` now normalizes `\` to `/` at the single choke point, covering every emitter (Claude/CodeBuddy PreToolUse, Gemini BeforeTool, Codex); quoting and the `--strict` suffix are preserved and POSIX is unaffected.
- Fix: with `--out`, semantic-cache writes now anchor correctly so the cache round-trips (#1990, #1991, thanks @mdshzb04). The final semantic-cache save resolved a relative `source_file` against the output dir and wrote 0 entries, and per-chunk recovery checkpoints landed in the wrong directory (under the corpus instead of `--out`). Cache entries now key on the scan root (portable, matching #1989) while the cache directory sits at the output root, so `check`/`save`/checkpoint/prune all agree; composes with the #1989 salt-keying and #1939 prompt-fingerprint namespacing.
- Fix: alias-based named re-exports no longer emit dangling absolute-path symbol targets (#1983, thanks @oleksii-tumanov). `export { X as Y } from './mod'` produced a `re_exports` edge whose symbol target was an absolute-path-prefixed id with no matching node — the symbol-level residual left by #1967 (imports-only) and #1976 (file-level). The aliased re-export target is now rewritten to the canonical symbol node when unambiguous; external re-exports and owned ids are left untouched, so no real edge is dropped.