# Session-migrate: Migrate coding agent sessions across Claude Code, Codex, Pi

> Source: <https://github.com/xhluca/session-migrate>
> Published: 2026-08-24 20:44:24+00:00

**Migrate your sessions to any harness.**

Move coding agent sessions among **Claude Code**,
**Codex**, **Pi**, **OpenCode**,
**GitHub Copilot CLI**, **Antigravity CLI**,
**Cursor Agent**, and **Mistral Vibe**.

```
uv tool install session-migrate
```

No `uv`

? Use the standalone installer:

```
curl -LsSf https://session-migrate.github.io/install.sh | sh
```

`pipx install session-migrate`

works too. Python 3.11+ and Linux are currently
supported. The full command is `session-migrate`

; `smigrate`

is the shorthand.
Already installed? Run `uv tool upgrade session-migrate`

.

Inspect any native transcript without printing its conversation:

```
smigrate inspect ~/.claude/projects/-work/SESSION.jsonl
```

Move a Claude session into Codex and resume it from the same project directory:

```
smigrate transfer SESSION_UUID --from claude --to codex --cwd "$PWD"
codex resume NEW_SESSION_UUID
```

Or find an older session by its native title/name first:

```
smigrate catalog refresh
smigrate catalog search "oauth refresh" --format claude
smigrate transfer --title "oauth refresh" --from claude --to pi
```

Search is case-insensitive and every word must match, in any order. It searches native titles, names, and IDs—not conversation bodies. A few useful patterns:

```
# “Fix flaky PostgreSQL timeout” also matches this reversed keyword order.
smigrate catalog search "timeout postgres"

# Find a release conversation among archived Codex sessions from this month.
smigrate catalog search "release notes" --format codex \
  --lifecycle archived --since 2026-08-01T00:00:00Z

# Opt in to matching a project directory when the title is vague.
smigrate catalog search "checkout api" --include-paths
```

`catalog refresh`

is exhaustive inside the default, environment-selected,
registered, and explicitly discovered roots. It does not crawl your whole disk.

Choose the route on the [project website](https://session-migrate.github.io/),
or replace the three bracketed values yourself:

Follow

[https://session-migrate.github.io/llms.txt]to migrate a session from`[SOURCE]`

to`[TARGET]`

. Session:`[UUID OR TITLE]`

The linked procedure is sandbox-tested with both Claude Code and Codex. See the
[agent workflow and verification](https://github.com/xhluca/session-migrate/blob/main/docs/coding-agent-instruction.md).

- Claude Code
- Codex CLI
- Pi
- OpenCode
- GitHub Copilot CLI
- Antigravity CLI
- Mistral Vibe
- Cursor Agent (experimental, pinned, text only)

Every listed format can be a source or target: 64 ordered routes, including same-format portable rewrites. Cursor deliberately transfers only ordered user/assistant text and is pinned to one exact Linux build; it is not a vendor-supported import API. Same-format migration creates a new independent session—it is not a byte-for-byte clone or a live sync.

| Session data | Result | Notes |
|---|---|---|
| User and assistant messages | ✓ | Preserved in order on every route |
| Tool calls and results | ✓ / partial | Preserved when both adapters support the native shape |
| Images | ✓ / partial | Supported image blocks move; other media is format-dependent |
| Compaction summaries | ✓ / partial | Recreated where the target has a portable equivalent |
| Readable reasoning | Vibe-only portable rewrite | Vibe keeps its explicit readable field when rewritten to Vibe; other/private/signed traces never move |
| Session name, ID, and picker entry | Recreated | The target gets a new native identity and resume state |
| Branches, forks, and subagents | Not flattened | Cataloged separately where detectable; migrate the parent session |
| Private or signed thinking | No | Model/provider-bound traces are deliberately omitted |
| Auth, hooks, policies, MCP, and runtime config | No | These remain with the source client |

Every omission or transformation is counted in a content-free migration
manifest. The source session is never modified. Cursor intentionally accepts
text only. See
[Pi thinking traces](https://github.com/xhluca/session-migrate/blob/main/docs/pi-thinking-traces.md).

```
native session → validated event timeline → native target → resume
```

Each reader projects a versioned native transcript into a small ordered model. Each writer then emits only structures verified against the target CLI. This is session migration, not text export: the target receives a discoverable, resumable native session.

[CLI reference](https://github.com/xhluca/session-migrate/blob/main/docs/cli-reference.md)[Coding-agent instruction](https://github.com/xhluca/session-migrate/blob/main/docs/coding-agent-instruction.md)[Session catalog](https://github.com/xhluca/session-migrate/blob/main/docs/session-catalog.md)[Compatibility details](https://github.com/xhluca/session-migrate/blob/main/docs/format-compatibility.md)[Troubleshooting](https://github.com/xhluca/session-migrate/blob/main/docs/troubleshooting.md)[Format research and validation](https://github.com/xhluca/session-migrate/blob/main/docs/validation-report.md)[Data handling and architecture](https://github.com/xhluca/session-migrate/blob/main/docs/architecture.md)[Antigravity format](https://github.com/xhluca/session-migrate/blob/main/docs/antigravity-format.md)[Experimental Cursor format](https://github.com/xhluca/session-migrate/blob/main/docs/cursor-format.md)[Mistral Vibe format](https://github.com/xhluca/session-migrate/blob/main/docs/vibe-format.md)

The Antigravity and Cursor adapters are clean-room, unofficial, and
version-pinned. Their independently observed formats are published separately:
[Antigravity research](https://github.com/xhluca/antigravity-session-interoperability)
and [Cursor research](https://github.com/xhluca/cursor-session-interoperability).

The demo above uses real native casts recorded with the same tmux + asciinema
approach as agent-talk. Claude diagnoses a boundary bug in a small project; the
migrated session is reopened in Pi, which applies the proposed patch and runs
the regression test. It shows the source TUI, the migration command, the shared
history, and the continued target session. The website plays those casts
directly in JavaScript; the README animation is rendered from that same scene.
The same source session is also continued in
[Claude → Codex](https://raw.githubusercontent.com/xhluca/session-migrate/main/docs/assets/demo-codex.gif).
[Watch the larger-text Pi video](https://github.com/xhluca/session-migrate/raw/main/docs/assets/demo-pi.mp4),
[watch the larger-text Codex video](https://github.com/xhluca/session-migrate/raw/main/docs/assets/demo-codex.mp4),
or [reproduce both](https://github.com/xhluca/session-migrate/blob/main/scripts/render-demo.sh).
The recorder uses disposable credential copies only to drive the native clients;
the published assets contain only the controlled demo project and omit account
status.

```
git clone https://github.com/xhluca/session-migrate.git
cd session-migrate
uv sync --dev
uv run pytest
```

See [the development guide](https://github.com/xhluca/session-migrate/blob/main/docs/development.md)
before changing a native
adapter. New formats need sanitized fixtures and a real native-resume oracle.