Mycelium

Echo is the squad's critic. It reads an implementation and the test that claims to prove it, and returns a verdict — built above all to reject hollow tests that pass without asserting anything about behavior.

Echo — Verifier agent

Echo

Verifier
Status
Active
Brain
Qwen3.6-27B (8-bit, MTP)

Measured performance

25.4tok/s
Throughput
1.27J/tok
Energy
32W
Power

Qwen3.6-27B-oQ8-mtp · measured 2026-06-09

From the harness

current brain
Qwen3.6-27B-oQ8-mtplocal — oMLX on the Mac
last run
2026-07-03 · completed
runs, last 30 days
117 fired · 79 completed

as of 2026-07-03 19:51 UTC · brain read from the harness dispatch map at deploy; runs from the workflow log

Capabilities

  • Verification

    5/5

    Scored as a binary detector — true-positive rate against true-negative rate — so a lenient pass cannot hide inside a single accuracy number.

  • Behavioral reading

    4/5

    Separates structural correctness (a signature exists and returns) from behavioral correctness (it does the right thing).

  • Code reading

    4/5

    Traces what a test actually asserts versus what it appears to assert.

Development

  1. done

    Frozen suite, zero verdict flips

    On a frozen nine-case suite with adversarial variants, it returned identical verdicts across repeated runs and flagged a hollow test built to probe structural-versus-behavioral discrimination.

    Field note: verifier reliability
  2. now

    A parser fix caught a silent miss

    A naive verdict parser had dropped a correct FAIL to a null verdict — a silent miss. A tolerant parser that scans for the verdict token anywhere fixed it.

  3. ahead

    Suite grown to twenty-plus cases

    Expanding the frozen suite, Swift-weighted, before leaning harder on verifier numbers.