# Partner set `cocarry_partners@v2`

<!-- Generated by scripts/render_partner_cards.py from chamber.partners.sets + the fingerprint archive — do not edit by hand. -->

Task: `cocarry@v1` · members: 12 (9 public / 3 private) · committed floor: 0.75 on the `fingerprint` probe.

v1's scripted stratum plus the campaign's jointly-trained partner-side stratum (ADR-027 §Versioning; ADR-011 §Decision as amended). Learned members carry real checkpoint URIs + committed payload SHA-256 custody; cross-play competence with the scripted reference ego is measured by the fingerprint/floor probe, not assumed — and it BIT: of the five preregistered jointly-trained candidates, four failed the 0.75 floor (0.000/0.000/0.050/0.650) and were dropped; joint_s4 (0.800) is the one admitted learned member. Evidence: spikes/results/partner-fingerprints/cocarry_partners-v2-dropped-candidates/. Split re-derived over the surviving 12; every v1 label is reproduced.

The public/private split is the deterministic ADR-009 rule — members ordered by `partner_id` hash, the first ⌈0.7·N⌉ public — recomputable from this roster; no hand-picking. Private members' behavioural parameters are withheld (published hashes, withheld parameters): they derive from the maintainer-held seed and verify against the committed digests. Set changes bump the version (ADR-027 §Versioning); frozen learned members join as a version bump.

| member | split | role | `partner_id` | floor success | fingerprint success |
| --- | --- | --- | --- | --- | --- |
| [`imp_nominal`](imp_nominal.md) | public | partner_arm | `3d43a19c051fc8bc` | 1 | 1 |
| [`imp_stiff_low`](imp_stiff_low.md) | public | partner_arm | `2551311d47ba8e57` | 1 | 1 |
| [`imp_stiff_high`](imp_stiff_high.md) | public | partner_arm | `4d0ae9868c4c10c8` | 1 | 1 |
| [`imp_damp_low`](imp_damp_low.md) | public | partner_arm | `5ac85b19c0f522ee` | 1 | 1 |
| [`imp_damp_high`](imp_damp_high.md) | public | partner_arm | `597b7116f63e09d8` | 1 | 1 |
| [`imp_slow`](imp_slow.md) | private | partner_arm | `e4a8042f3c362fde` | 1 | 1 |
| [`imp_fast`](imp_fast.md) | private | partner_arm | `bfa69a8aa3979220` | 1 | 1 |
| [`imp_lag_bounded`](imp_lag_bounded.md) | public | partner_arm | `a1d7304eb9f423a6` | 1 | 1 |
| [`imp_blend_a`](imp_blend_a.md) | private | partner_arm | `b6975bc340b25133` | 1 | 1 |
| [`imp_blend_b`](imp_blend_b.md) | public | partner_arm | `6883ea1ebef2f0d3` | 1 | 1 |
| [`imp_blend_c`](imp_blend_c.md) | public | partner_arm | `1d575685149b7174` | 1 | 1 |
| [`joint_s4`](joint_s4.md) | public | partner_arm | `5118f7828d8ac7b8` | 0.8 | 0.8 |

Fingerprint archive: `spikes/results/partner-fingerprints/cocarry_partners-v2/` (per-member ADR-028 v3 bundles + `fingerprints.json` + `SHA256SUMS.txt`).