Treat both proposals as net-new work on top of current main, not as
prior-shipped designs.

PROPOSAL-RPC-TOOL-HOOKS.md:
- Align afterToolCall sample code with earendil-works#3051 semantics (always pass
  result.details, drop !isError gate on hook application)
- Drop 'existing, unchanged' framing on the extension-hook block

PROPOSAL-RPC-CLIENT-TOOLS.md:
- Add per-tool executionMode to register_tool payload (earendil-works#3345)
- Bridge-tool execute() now takes ignored 5th ExtensionContext arg
- Document client-disconnect / stdin-EOF handling as an automatic
  resolution alongside agent abort
- Note renderShell alongside renderCall/renderResult as not crossing
  the boundary
- Clarify that TypeBox validation runs before the client sees args

…ial tool execution (earendil-works#3345)

* feat(agent,coding-agent): add per-tool executionMode field to AgentTool and ToolDefinition

Add optional executionMode?: ToolExecutionMode to AgentTool and
ToolDefinition interfaces. Propagate through wrapToolDefinition and
createToolDefinitionFromAgentTool. No behavioral change yet — agent
loop will read this field in a follow-up.

* feat(agent): support per-tool executionMode override for sequential execution

When a tool defines executionMode='sequential', the agent loop
forces sequential execution of all tool calls in that batch,
even if the global config is parallel.

* feat(coding-agent): re-export ToolExecutionMode from @mariozechner/pi-agent-core

Makes the type available to extensions that want to set
executionMode on tool definitions.

* feat(coding-agent): add tic-tac-toe extension example with executionMode: sequential

Demonstrates per-tool executionMode: the agent plays via move/play
tool calls that share a cursor. Without sequential execution, play
can resolve before earlier moves finish, landing on the wrong cell.

…ial tool execution (earendil-works#3345)

* feat(agent,coding-agent): add per-tool executionMode field to AgentTool and ToolDefinition

Add optional executionMode?: ToolExecutionMode to AgentTool and
ToolDefinition interfaces. Propagate through wrapToolDefinition and
createToolDefinitionFromAgentTool. No behavioral change yet — agent
loop will read this field in a follow-up.

* feat(agent): support per-tool executionMode override for sequential execution

When a tool defines executionMode='sequential', the agent loop
forces sequential execution of all tool calls in that batch,
even if the global config is parallel.

* feat(coding-agent): re-export ToolExecutionMode from @mariozechner/pi-agent-core

Makes the type available to extensions that want to set
executionMode on tool definitions.

* feat(coding-agent): add tic-tac-toe extension example with executionMode: sequential

Demonstrates per-tool executionMode: the agent plays via move/play
tool calls that share a cursor. Without sequential execution, play
can resolve before earlier moves finish, landing on the wrong cell.

…ial tool execution (earendil-works#3345)

* feat(agent,coding-agent): add per-tool executionMode field to AgentTool and ToolDefinition

Add optional executionMode?: ToolExecutionMode to AgentTool and
ToolDefinition interfaces. Propagate through wrapToolDefinition and
createToolDefinitionFromAgentTool. No behavioral change yet — agent
loop will read this field in a follow-up.

* feat(agent): support per-tool executionMode override for sequential execution

When a tool defines executionMode='sequential', the agent loop
forces sequential execution of all tool calls in that batch,
even if the global config is parallel.

* feat(coding-agent): re-export ToolExecutionMode from @mariozechner/pi-agent-core

Makes the type available to extensions that want to set
executionMode on tool definitions.

* feat(coding-agent): add tic-tac-toe extension example with executionMode: sequential

Demonstrates per-tool executionMode: the agent plays via move/play
tool calls that share a cursor. Without sequential execution, play
can resolve before earlier moves finish, landing on the wrong cell.

Consolidates 62 upstream commits (v0.67.4 -> v0.67.68) into the fork.
Preserves all fork-local work (OAuth cloak, antigravity pool, context
tiers, OSC 8 file hyperlinks, gemini3 sig skip, codex_cli_rs headers,
compaction context hooks, gpt-5.4 models).

Conflict resolutions (4 files):

- packages/ai/src/providers/google-gemini-cli.ts: layered upstream's
  onResponse hook call into our pool-aware retry loop; kept our
  finally-block pool.saveNow() path.

- packages/tui/src/utils.ts: adopted upstream's AnsiCodeTracker OSC 8
  impl wholesale. It's cleaner than our f16dfd5 version (preserves
  hyperlink across SGR reset via separate clear(), emits ST-terminated
  sequences). Dropped our 7d75fee SEGMENT_RESET fix since upstream's
  design never introduced the bug.

- packages/tui/src/components/markdown.ts: kept our resolveHref hook
  and wrapHyperlink helper but gated OSC 8 emission on
  getCapabilities().hyperlinks; switched to upstream's hyperlink()
  helper for consistency. Merges file path linking (ours) with
  terminal capability detection (upstream earendil-works#3248, #30a8a41f).

- packages/tui/test/{markdown,wrap-ansi}.test.ts: updated our OSC 8
  assertions to ST-terminated sequences (\x1b\\) to match new emitter;
  added setCapabilities({hyperlinks:true}) gating where needed;
  afterEach resetCapabilitiesCache to isolate test state.

Dependency upgrades from upstream:
- @anthropic-ai/sdk 0.73.0 -> 0.90.0
- @aws-sdk/client-bedrock-runtime 3.983.0 -> 3.1030.0
- @mistralai/mistralai 1.14.1 -> 2.2.0

Upstream features folded in:
- fix(ai): Opus 4.7 adaptive thinking + xhigh effort (earendil-works#3286)
- feat(ai): thinkingDisplay option (summarized/omitted/raw)
- feat(coding-agent): after_provider_response hook (earendil-works#3128)
- fix(ai): trust requested Codex service tier (earendil-works#3307)
- feat(bedrock): Bearer token auth for Converse API (earendil-works#3125)
- feat(agent,coding-agent): per-tool executionMode override (earendil-works#3345)
- feat(tui): OSC 8 hyperlinks with terminal capability detection
  (earendil-works#3248, #30a8a41f)
- feat(coding-agent,tui): argument-hint frontmatter in prompts (earendil-works#2780)
- Plus ~40 smaller fixes across ai/coding-agent/tui/agent.

Verification:
- packages/tui: 559/559 tests pass
- packages/ai: 144/144 OAuth cloak tests pass; all fork-local suites
  pass (antigravity-pool, context-tiers, gemini3-unsigned-tool-call,
  codex-stream, supports-xhigh, etc.). Remaining test failures (13)
  are pre-existing live-API E2E tests (no credentials in this env).
- packages/agent: 39/39 tests pass.
- packages/coding-agent: 1020/1021 tests pass; 1 flaky bash timeout
  test (passes in isolation), unrelated to merge.
- All four packages build cleanly.