docs: finish the whole-file-diff sweep across comments and RFCs

Codex's stale-prose pass found seven more spots still describing the
result diff as ALWAYS an applied contextual hunk, or a create/binary
overwrite as rendering "only the call-time card": the DiffCallView JSDoc
and the acp bridge diff-arm comment, the FsWriteOutcome.before and
readTextForDiff JSDoc, and three RFC lines. All now say: the result diff
is the applied change — a contextual hunk when there is a before-image,
else a whole-file diff (create / undiffable binary) — and a successful
mutation always returns the result diff so the model-facing text can't
clobber it. Regenerate the cordis catalog (source line shift).

docs/cordis-catalog/events-and-services.md

@@ -547,7 +547,7 @@ async execute(exec: ToolExecution): Promise<ToolExecutionResult>
 
 Types: [ToolDefinition](../core-data-structures/tools.md) · [ToolExecution](../core-data-structures/tools.md) · [ToolExecutionResult](../core-data-structures/tools.md)
 
-Source: [`packages/core/tools/src/index.ts:365`](../../packages/core/tools/src/index.ts)
+Source: [`packages/core/tools/src/index.ts:366`](../../packages/core/tools/src/index.ts)
 
 ## Inherited tier (cordis core + loader/hmr/timer)
 

docs/rfc/implemented/architecture/2026-07-02-result-time-applied-hunk-diffs.md

@@ -35,7 +35,7 @@ Per the [capability-seam split](2026-06-13-capability-seams.md), the storage bac
 
 ### 3. The bridge renders a `diff` result card
 
-`ToolResultView` gains a `DiffResultView { card:'diff'; title?; diffs: FileDiff[] }`; the bridge's result-side `switch (view.card)` gets a `diff` arm emitting the `{type:'diff'}` `ToolCallContent` blocks (mirroring the call-side arm). An ACP `tool_call_update.content` REPLACES the call's content in an editor, so the result-time contextual hunk **supersedes** the call-time snippet — the two-update sequence (call snippet, then result hunk) matches `claude-agent-acp` exactly.
+`ToolResultView` gains a `DiffResultView { card:'diff'; title?; diffs: FileDiff[] }`; the bridge's result-side `switch (view.card)` gets a `diff` arm emitting the `{type:'diff'}` `ToolCallContent` blocks (mirroring the call-side arm). An ACP `tool_call_update.content` REPLACES the call's content in an editor, so the result diff **supersedes** the call-time snippet (and keeps the model-facing result text from clobbering it) — the two-update sequence (call snippet, then result diff) matches `claude-agent-acp` exactly.
 
 ### The diff algorithm — a third-party runtime dependency over vendoring
 
@@ -44,7 +44,7 @@ Computing hunks-with-context is a solved problem with sharp edge cases (grouping
 ## Non-goals
 
 - **Live incremental diff streaming.** The hunk is computed once, after the mutation completes; there is no per-keystroke diff.
-- **Diffing a binary/non-UTF-8 overwrite.** `before` is `null` for such a file (it has no text diff basis); the write still succeeds and renders the call-time card only.
+- **Diffing a binary/non-UTF-8 overwrite.** `before` is `null` for such a file (it has no text diff basis); the write still succeeds and the result renders a whole-file diff (`oldText: null`) rather than a contextual hunk.
 - **Rename/move diffs.** Only content diffs of a single resolved path.
 
 ## Related

docs/rfc/implemented/architecture/2026-07-02-tool-render-intent-union.md

@@ -65,6 +65,6 @@ interface TerminalResultView { card: 'terminal'; title?: string; output?: string
 ## Related
 
 - Supersedes the deferral in [Collapse tool-owned UI presentation](../../rejected/simplification/2026-06-20-generic-tool-rendering.md) (rejected — "wait for two real tools and two real consumers, then a tagged render-intent union"). That bar is now met; this is that union.
-- Extended by [Result-time applied-hunk diffs](2026-07-02-result-time-applied-hunk-diffs.md), which adds a persisted `meta` channel so write/edit emit a result-time contextual-hunk `DiffResultView` (context lines + one hunk per `replace_all` site) on top of this union's call-time diff card.
+- Extended by [Result-time applied-hunk diffs](2026-07-02-result-time-applied-hunk-diffs.md), which adds a persisted `meta` channel so write/edit emit a result-time `DiffResultView` — the applied change (a contextual hunk with context lines / one per `replace_all` site, or a whole-file diff for a create) — on top of this union's call-time diff card.
 - Folds `ToolTerminal` into the `terminal` views described by [ACP terminal and tool-call rendering](../feature/2026-06-18-acp-terminal-and-tool-rendering.md) (the `_meta` terminal-card convention and capability gate are unchanged; only the harness-side presentation type changes).
 - The ACP SDK's `Diff` / `ToolCallContent` types back the new `diff` card.