timestamps git:20261014.6d74573A

Immutable. This exact content never changes and is served at /api/v1/blob/d5d8244c65c81ad3.

---
name: timestamps
description: Configure Timestamps when the user asks to change timestamps, timezone, clock format, marker appearance, elapsed time, tool timing, summaries, history, or model-facing time notes.
---

# Configure Timestamps

Use the repository's CLI so configuration is parsed and validated by the same
code used by the hooks. Run commands from the Git root, or resolve the root
with `git rev-parse --show-toplevel`.

Read `schema.json` first when the user asks for a setting you do not recognize.
It is the source of truth for keys, accepted values, aliases, presets, and
marker grammar. Do not silently invent or accept a value the schema rejects.

Show current settings with:

```bash
bash "$(git rev-parse --show-toplevel)/hooks/scripts/setup.sh" --show
```

Use the matching CLI flag for a requested change, for example:

```bash
bash "$(git rev-parse --show-toplevel)/hooks/scripts/setup.sh" --tz=Europe/Amsterdam
bash "$(git rev-parse --show-toplevel)/hooks/scripts/setup.sh" --display=short
bash "$(git rev-parse --show-toplevel)/hooks/scripts/setup.sh" --color=none
bash "$(git rev-parse --show-toplevel)/hooks/scripts/setup.sh" --tool-timing=on
```

Use `--help` and the flag table in `hooks/scripts/setup.sh` for the complete
mapping. For several changes, pass several flags in one invocation. Report
what changed and say that it takes effect on the next message.

For measured reports, use `--session` or `--stats`; do not estimate duration
from the conversation. History stores timings only, never message text.

Codex receives model-facing timing context and the end-of-session summary from
its hooks. It has no Claude-style `MessageDisplay` event, so the visual marker
is available in Claude Code but not in Codex.