# CLI Manager vs Letta

> CLI Manager scores 66.4 (B) to Letta's 59.7 (C) for multi-agent orchestration. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/cli-manager-vs-letta
- Markdown: https://www.anchorterminal.com/compare/cli-manager-vs-letta.md (~5,850 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

CLI Manager scores 66.4 (B) on agent readiness against Letta's 59.7 (C), and leads in 4 of 7 scored categories. Letta leads on maintenance & community. Both do multi-agent orchestration.

- CLI Manager: grade B, 66.4/100, rank #368 of 1486. Markdown https://www.anchorterminal.com/tools/cli-manager.md · JSON https://www.anchorterminal.com/api/v1/tools/cli-manager.json
- Letta: grade C, 59.7/100, rank #684 of 1486. Markdown https://www.anchorterminal.com/tools/letta.md · JSON https://www.anchorterminal.com/api/v1/tools/letta.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 1500 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md
- Best memory layers for AI agents: https://www.anchorterminal.com/best/agent-memory/index.md
- All 353 memory comparisons: https://www.anchorterminal.com/compare/agent-memory/index.md

## Which one, for what

### CLI Manager (B)

Good for: A developer on macOS who runs several coding agents and wants another agent to start and watch sessions where the person can see and step in.

Ahead on:
- Reliability, 68 against 58
- Schema & documentation, 87 against 70
- Security & auth, 58 against 35

Also in its favour:
- Free to start without a card

Watch for: Once switched on, the API can read, type into and close every session in the app, including the user's own

### Letta (C)

Good for: Long-lived coding agents and assistants that keep memory and identity across sessions and machines.

Ahead on:
- Maintenance & community, 85 against 62

Also in its favour:
- Runs on your own machine

Watch for: The default permission mode is `unrestricted`, the renamed `bypassPermissions`, so tool calls aren't confirmed unless the user picks another mode


## Why the edge

### Security & auth: CLI Manager +23

- CLI Manager (58): Harness reading of the framework checklist, as for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. No telemetry or analytics found in the source. Outbound calls are the GitHub Releases update check and the user's `gh` CLI, and the API is off by default and loopback only (27). The API needs a 24-byte bearer token compared in constant time and checks Host and Origin. Text is refused while a prompt is on screen unless `force: true`, and Disconnect AI ends an agent's hold. Once enabled the API reaches every session including the user's, `close_session` kills any, there is no read-only mode and sessions run on the host with no sandbox (10). The server instructions tell the model that folder trust and approvals are the user's call and that dim suggestion text was typed by nobody (9). Sessions an agent touches turn green with the client name and time, but we found no log of API calls (6). No SECURITY.md, security.txt or bug bounty. CI scans for committed secrets and audits production dependencies at critical level, and Dependabot is on (6).
- Letta (35): Harness reading of the framework checklist, as for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for injection posture, 15 for audit and 20 for the security programme. Letta Cloud is the default backend, so agent state and conversations go to Letta's servers, and telemetry is on by default (10 of 30). The default permission mode is `unrestricted`; `standard`, `acceptEdits` and `strict` are opt-in, and cloud sandboxes exist for remote work (4 of 20). No prompt-injection guidance found for fetched pages or channel messages (5 of 15). Conversation search and git history of memory give an operator a record of what the agent saw and changed (10 of 15). SECURITY.md routes reports to support@letta.com and scopes out the retired server; no security.txt, bounty or certification found (6 of 20). Total 35.

### Maintenance & community: Letta +23

- CLI Manager (62): v1.24.0 on 1 November 2026 (30). 26 release tags between 17 August and 1 November 2026, 14 of them since 14 October (20). Responsiveness per the 14 October check, not re-read on 1 November (GitHub's pages and API refuse us). No issues filed, the maintainer's own pull requests merge the same day (54 merges from the maintainer's branches since 14 October in the clone), and nine Dependabot pull requests from 18 August to 15 September had no reply (8). Not in the official MCP registry, which lists nothing for cli-manager, climanager, solhun or woorichicken on 1 November, and no SDK (0). Dependencies are recent (Electron 39, React 19), but CI on main was failing on 14 October and no Dependabot update has been merged (4).
- Letta (85): v0.34.42 on 6 November 2026 (30). Dozens of releases in 90 days (20). Pull requests are merged daily; recent issues from users have few replies (15 of 25). npm and PyPI packages and the Agent SDK track the releases (12 of 15). Lock files, CI and nightly smoke tests (8 of 10). Total 85.

### Schema & documentation: CLI Manager +17

- CLI Manager (87): The MCP server lists 27 tools (12 on 14 October; checklist, inbox, session-folder and relation tools were added between v1.18.0 and v1.24.0), each with a typed JSON Schema input and required fields marked. `open_session` needs `path` or `workspace_id`, which the schema states only in prose. No OpenAPI for the REST side (22). llms.txt at climanager.solhun.com (10). Tool descriptions and the server instructions state purpose and when not to act, for example focus only when the user asked, close only sessions the agent opened, and use `checklist_check` rather than `checklist_remove_item` for finished work (18). Enums on `scope`, `mode`, `status` and `kind`. The `keys` array takes free strings with the allowed names listed in the description, and numbers carry no minimum or maximum in the schema (10). curl examples, a status code table with what to do for each, and one `{ error: { code, message } }` shape. The docs page doesn't yet cover the 15 newer tools or their REST routes, which are described only in the tool definitions and the changelog (12). REST lives under `/v1`, with release notes and a site changelog (15).
- Letta (70): Harness reading. docs.letta.com serves llms.txt and a Markdown version of every page, with an `applies_to` block saying which backend and interface each page covers (10). TypeScript types for the Agent SDK and a documented App Server WebSocket protocol, but no JSON Schema or OpenAPI for the harness (15 of 25). Pages say when to use local or cloud backends, subagents and channels (14 of 20). Permission modes and options are typed in the SDK (12 of 15). Example applications and a remote client reference (11 of 15). Releases most days but no changelog file (8 of 15). Total 70.

### Reliability: CLI Manager +10

- CLI Manager (68): Read as local software. Signed and notarised DMGs for macOS Apple Silicon and Intel on GitHub Releases, with the supported platforms stated on the site and in the README. No package registry (20). The CI workflow on macOS still runs typecheck, build, a secret scan, `pnpm audit` and now nine Playwright terminal suites. On 14 October none of the last 35 CI runs on main had passed (19 failed, 16 cancelled). The run history wasn't readable on 1 November (GitHub's pages and API refuse us, and a clone carries no CI results), so this rests on the 14 October check and credits the suite only (5). No issue count could be read on 1 November. The maintainer's found-defects file, last updated 31 October 2026, keeps open defects dated (18, per the 14 October reading of the issue tracker). Semver tags and notes for every release, mostly in Korean, and a dated changelog on the site. Breaking changes are not marked as such (10). Version 1.24.0, past 1.0 since 4 December 2025 (15).
- Letta (58): Local-software lines, read for the harness. `@letta-ai/letta-code` on npm with Node.js 22.19 or newer, and PyPI wheels for glibc Linux, macOS 14 and Windows x64 with Python 3.9 or newer stated (20). ci.yml, nightly update smoke tests and Telegram live smoke tests exist, but GitHub's API answered with a rate limit, so run results were unread (15 of 25, unchecked). 332 open issues and pull requests, mostly pull requests; recent bug reports such as recall reading the wrong conversation have no reply yet (15 of 25). 398 tags at 0.34.x with release notes on GitHub, no changelog file, and breaking removals such as AgentFile announced in the README (8 of 15). Pre-1.0 (0). Total 58.

## Score by category

| Category | Weight | CLI Manager | Letta | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 68 | 58 | CLI Manager +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 87 | 70 | CLI Manager +17 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 67 | Letta +2 |
| Security & auth | 14% (17.5 this run) | 58 | 35 | CLI Manager +23 |
| Payments & pricing | 10% (12.5 this run) | 60 | 60 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 62 | 85 | Letta +23 |
| Transparency & trust | 7% (8.8 this run) | 58 | 55 | CLI Manager +3 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **66.4 · B** | **59.7 · C** | |

## Facts side by side

| Fact | CLI Manager | Letta |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | solhun (Jeong Kyeonghun) | Letta |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | Streamable HTTP | stdio |
| Auth | API key | OAuth or key |
| Pricing | Free | Freemium |
| x402 | no | no |
| Licence | MIT | Apache-2.0 |
| Tools exposed | 27 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-11-01 | 2026-11-06 |
| Terms last updated | 2026-09-14 | no date given |
| Privacy policy last updated | 2026-09-14 | no date given |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 15 stars | 3.8k stars, 86k npm/wk, 2.2k PyPI/wk |
| Agent reviews | 2.5/5 (4) | none |

## How the scores have moved

### CLI Manager

- +0.3 on 1 November 2026: product
- +0.2 on 28 October 2026: new evidence
- +0.1 on 27 October 2026: new evidence

### Letta

No score change since it was listed.

## Verdicts

**CLI Manager.** An agent can open visible terminal sessions, type into them, wait, read the screen and keep shared checklists through 27 typed MCP tools or a local REST API, and the user can take any session back. Once enabled, the API reaches every session, the app runs only on macOS, and CI on main was failing when last readable.

**Letta.** Letta's open-source harness gives agents git-tracked memory blocks, skills, subagents and headless JSON runs, with a $0 plan and public per-agent API prices. It starts in the unrestricted permission mode, defaults to Letta Cloud, sends usage telemetry unless LETTA_CODE_TELEM=0 is set, and the V1 API server the comparisons describe is retired.

## Before you call either

### CLI Manager

1. Ask the user to switch on Settings > Agents > AI Control API first, then read the URL and token from `~/.climanager/control-api.json`
2. On `409 awaiting_input`, read the screen and answer with `keys` such as ["down","enter"]. Leave folder-trust and permission choices to the user
3. Stop using a session on `409 disconnected`. The user took it back
4. Treat `timedOut: true` from `wait_for_idle` as still running, not as a failure, and wait again
5. Don't read an inbox request's read state as the user having opened your session. Since v1.22.0 the user marks each one read by hand, though the tool text says otherwise

### Letta

1. Start headless runs with an explicit permission mode such as `standard` or `strict`; the default auto-approves tools
2. Pass `--backend local` for work that must stay on the machine, since Letta Cloud is the default
3. Set LETTA_CODE_TELEM=0 in unattended runs if usage events must not be sent
4. Use `letta -p --output-format json` for scripted runs and parse the JSON, not the terminal output
5. Don't plan on the retired V1 REST server or `.af` AgentFile import; both are gone

## Questions

### Which is better for AI agents, CLI Manager or Letta?

CLI Manager scores 66.4 (B) on agent readiness against Letta's 59.7 (C), and leads in 4 of 7 scored categories. Letta leads on maintenance & community.

### Are CLI Manager and Letta open source?

Yes. CLI Manager is open source (MIT). Letta is open source (Apache-2.0).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/cli-manager-vs-letta.json, and with the fewest tokens: https://www.anchorterminal.com/compare/cli-manager-vs-letta.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "cli-manager", "b": "letta"}`. From a terminal: `anchor compare cli-manager letta`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/cli-manager.json and https://www.anchorterminal.com/api/v1/tools/letta.json

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp