graphify 0.9.20

• 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.