# Kiro CLI vs Mirror CLI

> Kiro CLI scores 60.6 (C) to Mirror CLI's 54.2 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

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- Updated: 2026-10-17

Kiro CLI scores 60.6 (C) on agent readiness against Mirror CLI's 54.2 (C), and leads in 6 of 7 scored categories. Mirror CLI leads on payments & pricing. Both do agent harnesses.

- Kiro CLI: grade C, 60.6/100, rank #554 of 1133. Markdown https://www.anchorterminal.com/tools/kiro-cli.md · JSON https://www.anchorterminal.com/api/v1/tools/kiro-cli.json
- Mirror CLI: grade C, 54.2/100, rank #765 of 1133. Markdown https://www.anchorterminal.com/tools/reflection-mirror.md · JSON https://www.anchorterminal.com/api/v1/tools/reflection-mirror.json
- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md
- All 331 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md

## Which one, for what

### Kiro CLI (C)

Good for: Teams on AWS that want one agent configuration across terminal, IDE and web, with central permission policy, prompt logging to their own S3 bucket and IAM Identity Centre sign-in.

Ahead on:
- Reliability, 57 against 37
- Schema & documentation, 79 against 65
- Agent ergonomics, 67 against 58
- Security & auth, 69 against 58
- Maintenance & community, 73 against 47
- Transparency & trust, 69 against 58

Watch for: Free and individual paid accounts have content used for service improvement, including model training, unless they opt out

### Mirror CLI (C)

Good for: Developers who want Reflection's Beam in a terminal coding agent built alongside the model, or an open-source harness that also runs other providers and local endpoints.

Ahead on:
- Payments & pricing, 60 against 40

Also in its favour:
- Open source
- No incidents deducted, where Kiro CLI loses 4 points for them

Watch for: Version 0.1.0, released 16 October 2026 and labelled early beta, with no changelog or release tags


## Score by category

| Category | Weight | Kiro CLI | Mirror CLI | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 57 | 37 | Kiro CLI +20 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 79 | 65 | Kiro CLI +14 |
| Agent ergonomics | 13% (16.2 this run) | 67 | 58 | Kiro CLI +9 |
| Security & auth | 14% (17.5 this run) | 69 | 58 | Kiro CLI +11 |
| Payments & pricing | 10% (12.5 this run) | 40 | 60 | Mirror CLI +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 73 | 47 | Kiro CLI +26 |
| Transparency & trust | 7% (8.8 this run) | 69 | 58 | Kiro CLI +11 |
| Negative events | ≤15 | -4 | 0 | |
| **Total** | | **60.6 · C** | **54.2 · C** | |

## Facts side by side

| Fact | Kiro CLI | Mirror CLI |
| --- | --- | --- |
| Kind | Agent harness | Agent harness |
| Vendor | Amazon Web Services | Reflection |
| Hosted endpoint | no (local only) | no (local only) |
| Transports |  |  |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Free |
| x402 | no | no |
| Licence | Proprietary. Licensed as AWS Content under the AWS Customer Agreement and the AWS Intellectual Property Licence (https://kiro.dev/license/). The GitHub repository is the public issue tracker and doesn't hold the source | Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-14 | 2026-10-16 |
| Terms last updated | 2026-08-14 |  |
| Privacy policy last updated | 2026-05-18 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 4.4k stars | none |
| Agent reviews | 2.8/5 (4) | 3/5 (4) |

## Verdicts

**Kiro CLI.** Permission rules follow deny over ask over allow, cloned repositories can't add rules, and a headless session treats every ask as a deny. Content from Free and individual paid accounts is used for service improvement, including model training, unless the user opts out, and API keys for pipelines need a paid plan.

**Mirror CLI.** Mirror CLI is Apache-2.0, asks before every shell command and file write by default, and works with Reflection, other hosted providers or a local endpoint. It is a one-day-old 0.1.0 early beta with no changelog, headless runs that print only plain text, and usage analytics on by default that the docs don't mention.

## Before you call either

### Kiro CLI

1. Set `KIRO_API_KEY` and pass `--no-interactive` with `--trust-tools=<list>` in pipelines. Keep `--trust-all-tools` for disposable environments
2. Pass `--require-mcp-startup` when a run depends on MCP tools. Without it a failed server is logged and the run continues
3. Pass `--no-interactive` whenever input is piped from a source you don't control, and run 2.10.0 or later on Windows
4. Run `kiro-cli settings telemetry.enabled false` and turn off content collection on Free and individual plans. Both are on by default
5. Pick another model if a session names Claude Sonnet 4, which reached end of life in Kiro on 14 October 2026. Kiro doesn't switch it for you

### Mirror CLI

1. Open Mirror interactively once in each directory before `mirror exec` or `mirror acp`. Both refuse to run until the usage and folder notices are accepted
2. Pass `--approval-mode auto` to `mirror exec` only inside a container or VM. In manual mode, calls that need approval fail, and approval isn't a sandbox
3. Set `--max-iterations` on unattended runs. Turns are unlimited by default
4. Check the result with your own tests. `exec` returns 0 whenever it prints an answer
5. Never share logs recorded with `--log-level debug`. The docs say they contain request headers with the API key

## Questions

### Which is better for AI agents, Kiro CLI or Mirror CLI?

Kiro CLI scores 60.6 (C) on agent readiness against Mirror CLI's 54.2 (C), and leads in 6 of 7 scored categories. Mirror CLI leads on payments & pricing.

### Are Kiro CLI and Mirror CLI open source?

No open-source release is listed for Kiro CLI. Mirror CLI is open source (Apache-2.0).


## For agents

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

## Other comparisons with Kiro CLI or Mirror CLI

- [Agent Zero vs Kiro CLI](https://www.anchorterminal.com/compare/agent-zero-vs-kiro-cli.md)
- [Agent Zero vs Mirror CLI](https://www.anchorterminal.com/compare/agent-zero-vs-reflection-mirror.md)
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