Grok Build Src bb7f39d5858c

• [new] Length-truncated responses continue automatically instead of failing the turn.
• [new] Hooks can ask the user to confirm a tool call instead of always allowing or denying.
• [new] Hooks can request deferral or add context shown to the model after a tool runs (including richer PostToolUse feedback and optional model-facing output replacement).
• [new] Session close records detailed timing data for performance analysis.
• [new] Credit limit upsell offers a Try Again button to retry the last prompt.
• [new] Pasted images show a live pixel preview in the prompt box on iTerm2.
• [new] grok usage <session-id> [turn] prints persisted per-turn token and cost totals as JSON (session-wide totals included).
• [fix] Transient inference failures (stalls, drops, 5xx) retry automatically instead of ending the turn.
• [fix] Windows users can correctly open ~/.grok and worktree sessions.
• [fix] Session data is more reliably saved after prompts and on power loss.
• [fix] Compaction failures show the actual error instead of a generic message.
• [fix] Truncation error messages show the right guidance instead of an unhelpful retry suggestion.
• [fix] Truncated tool calls are executed instead of failing the turn when arguments are complete.
• [fix] Images larger than 2000px no longer brick sessions on many-image requests.
• [fix] Wrapped hyperlinks in the pager remain fully clickable on Windows Terminal (not only the first line).
• [fix] Recurring scheduled tasks include a reminder to stop the monitor when work finishes.
• [fix] Scheduled task IDs are full UUID strings, avoiding collisions when tasks are created in the same millisecond.
• [changed] Subagent spawning is faster when connections drop during bursts.
• [changed] Session startup with MCP servers is much faster when auth is already configured.
• [changed] MCP server startup no longer stalls behind a fixed batch size.
• [changed] CLI downloads are compressed, so fresh installs and updates are substantially faster.
• [changed] Strict sandbox reads CWD + system paths + ~/.grok; writes are limited to CWD + ~/.grok/sessions + temp (not the whole ~/.grok tree).
• [changed] Read/Edit/Grep permission checks follow in-path symlinks for deny/ask on the resolved target; unresolved in-path symlinks prompt when deny/ask file rules apply.

Agent & tools

• [changed] PreToolUse / hook decisions: hooks may prompt for user confirmation on a tool call, not only allow or deny.
• [changed] PostToolUse: hooks run after the tool finishes; they can feed block reasons and additionalContext to the model, and settings-file hooks can replace the model-facing tool output (updatedToolOutput / updatedMCPToolOutput) while scrollback and telemetry keep the original. Default timeout for PostToolUse matches other gates (600s). Exit code 2 now feeds stderr to the model for this event.
• [changed] Hook event envelopes include both hookEventName (Grok snake_case) and hook_event_name (Claude-style PascalCase). PostToolUse also exposes a tool_response alias for toolResult.
• [changed] Session-end hook budgeting is clearer: each SessionEnd hook is bounded by its own timeout (default 1.5s; override with GROK_SESSION_END_HOOKS_TIMEOUT_MS, capped at 60s).
• [new] Shell helper grok usage for offline session token/cost inspection (complements in-TUI /usage).

Docs

• [changed] Custom Hooks guide and user-guide Hooks chapter document confirm/deferral behavior, PostToolUse output control, exit-code semantics, dual event-name fields, and porting notes.
• [changed] Slash commands and Sessions document grok usage.
• [changed] Sandbox profile table and strict/read paths updated; sandbox event log location described under session storage.
• [changed] Permissions and safety documents symlink follow behavior for native Read/Edit/Grep and shell-touched paths.
• [changed] Config reference: features.repo_status_in_system_prompt, prompt-suggestion knobs (prompt_suggestions.max_output_tokens, temperature, reasoning_effort), and related defaults/env wiring.

Under the hood

• Product version 1.0.13 (xai-grok-shell / pager / version crates bumped accordingly).
• Length-salvage path for truncated completions; post-tool-use delivery path for hook context and replacements.
• Settings cache and startup prefetch paths to speed session bring-up (especially with MCP auth already present).
• Managed-config layout split (policy/store/supervisor); session usage file persistence; worktree cleanup helpers.
• Subagent resume-window handling for faster recovery when connections drop mid-burst.
• Compressed CLI download payload for installs/updates.
• Additional model id surface: grok-4-1-fast-non-reasoning.
• Dependency add: hmac in the workspace Cargo manifest.

Upgrade notes

• If you ship PostToolUse hooks that end with exit $? from checkers that use exit 2 (e.g. some linters/tests), end with an explicit exit 0 when you only meant to log — exit 2 now forwards stderr to the model.
• Output replacement on PostToolUse is settings-file (command/HTTP) only; SDK-registered hooks can still send block reasons and additionalContext but cannot replace tool output.
• Replacements for built-in tools must match Grok’s own tool output shape (from toolResult); bad shapes are dropped and marked failed while the original result stands.
• Review strict sandbox expectations if you relied on writing outside ~/.grok/sessions under that profile.
• From source: sync to bb7f39d5858c (or the 1.0.13 tree) and rebuild as usual; no Cargo.lock package-count churn beyond the version bump set.