chore: remove bash core handler + rename tempfile prefixes (#47, #60)

CONTEXT.md

@@ -75,7 +75,7 @@ Job: take the agent's native hook payload, normalise it into the shape the [core
 
 ## Core handler
 
-The agent-neutral pipeline that, given a normalised proposal, decides whether to show a preview, computes the original and proposed file content, and makes the [RPC](#rpc) call into the running Neovim. Today: `bin/core-pre-tool.sh` and `bin/core-post-tool.sh`. Issue #47 phases 3 and 4 fold the core handler into in-process Lua (`lua/code-preview/pre_tool.lua` / `post_tool.lua`), invoked through a single RPC call from the per-agent [hook entry](#hook-entry); the orchestration role stays the same but no longer runs in a separate process. See [ADR-0005](docs/adr/0005-core-handler-runs-in-process.md).
+The agent-neutral pipeline that, given a normalised proposal, decides whether to show a preview, computes the original and proposed file content, and makes the [RPC](#rpc) call into the running Neovim. Lives in-process at `lua/code-preview/pre_tool/init.lua` and `lua/code-preview/post_tool.lua`, invoked through a single RPC call from the per-agent [hook entry](#hook-entry). The historical out-of-process bash implementation (`bin/core-pre-tool.sh`, `bin/core-post-tool.sh`) was removed when issue #47 phase 3 finished for all backends; see [ADR-0005](docs/adr/0005-core-handler-runs-in-process.md) for the canonical history.
 
 The core handler is where shell-write detection, `visible_only` gating, and `permissionDecision` emission live — everything that doesn't depend on which agent fired the hook.
 
@@ -120,7 +120,7 @@ Two levels of fidelity for handling `Bash` proposals.
 
 Three distinct path concepts used together in the [preview](#preview) pipeline. They are *not* interchangeable; the current code muddles them (see [issue #55](https://github.com/Cannon07/code-preview.nvim/issues/55)).
 
-- **Source path** — a temp file holding pre-rendered content (`/tmp/claude-diff-{original,proposed}-<pid>`). One pair per preview: `original_source_path` and `proposed_source_path`. Scratch files, not the real file.
+- **Source path** — a temp file holding pre-rendered content (`/tmp/code-preview-diff-{original,proposed}-<id>`). One pair per preview: `original_source_path` and `proposed_source_path`. Scratch files, not the real file.
 - **File path** — the absolute canonical path of the real file being edited. The *identity*: used as the key in `active_diffs`, passed to the [changes](#change) registry, used by neo-tree reveal.
 - **Display path** — what's rendered in the winbar. Usually cwd-relative for readability; never used as an identity.
 

backends/claudecode/code-preview-diff.sh

@@ -1,11 +1,11 @@
 #!/usr/bin/env bash
 # code-preview-diff.sh — PreToolUse hook entry for Claude Code.
 #
-# After issue #47 phase 3, this shim does almost nothing: it discovers the
-# running Neovim's socket and makes a single RPC call into the in-process
-# orchestrator (lua/code-preview/pre_tool/init.lua), then prints whatever the
-# orchestrator returns. The 600 lines of bash that used to live in
-# core-pre-tool.sh are gone.
+# This shim does almost nothing: it discovers the running Neovim's socket
+# and makes a single RPC call into the in-process orchestrator
+# (lua/code-preview/pre_tool/init.lua), then prints whatever the orchestrator
+# returns. The 600 lines of bash that used to handle this out-of-process are
+# gone (see ADR-0005).
 #
 # When Neovim is unreachable, the shim abstains: exit 0 with no stdout.
 # Claude Code falls back to its native permission flow as if the plugin