`co_hold_secure@v0` — Co-hold-and-secure (spec-only candidate)

A fixation-tooling task: one robot holds a part under continuous contact while the other performs a securing operation at a moderate, sourced operate tolerance — a fastening or connector seat, never a zero-clearance peg (the co-insert correction). It is the pre-committed escalation target if handover-and-place washes out, and the v1.1 flagship candidate. This is a spec-only placeholder: no env factory is wired yet.

Tier 3 — documented candidates and closures · Status: CANDIDATE · Suite: CHAMBER-Bench v1.0 (adr/ADR-027-chamber-bench-v1-protocol.md)

Spaces

Action space. To be specified: one robot holds a part under continuous contact while the other performs a securing operation.
Observation. To be specified at Gate-0 pre-registration.
Simulator backend. unspecified (spec-only) · Agents. 2

Stress channel

Holding-contact force under continuous contact (to be pinned at Gate-0 pre-registration)

Axis validity

Per-cell status under the validity matrix (adr/ADR-027-chamber-bench-v1-protocol.md):

AS	OM	CR	CM	PF	SA
`untested`	`untested`	`untested`	`untested`	`untested`	`untested`

Industrial analogue

Fixtureless welding and robotic machining or finishing: one robot holds the workpiece in place of a dedicated fixture while another welds, drills, or fastens — the settings where high process force makes the inter-robot coupling strongest.

Committed falsifier

If a passive fixture — a single robot plus static tooling — matches the two-robot team under the same tolerances, the task is fixture-design-plus-single-arm and is not admitted (the A2 two-robot-infeasibility gate applied to fixation tooling).

Evidence

How to run one episode

import chamber.tasks

# Spec-only placeholder — no env factory is wired yet:
chamber.tasks.make("co_hold_secure")  # raises NotImplementedError

Notes

The pre-committed escalation target if handover-and-place washes out (the handover-place Gate-0 prereg's escalation clause names cross-modal co-hold-and-secure), and the v1.1 flagship candidate. Fixation-tooling structure: one robot holds a part under continuous contact, the other performs a securing operation, at a moderate, sourced operate tolerance — a fastening or connector seat, never a zero-clearance peg (the co-insert correction). Industrial anchors (public sources): fixtureless welding and robotic machining/finishing, where one robot holds while another operates and high process force makes the coupling strongest. Committed falsifier (the A2 gate applied to fixation tooling): if a passive fixture — single robot plus static tooling — matches the two-robot team under the same tolerances, the task is fixture-design-plus-single-arm and is not admitted.

co_hold_secure@v0 — Co-hold-and-secure (spec-only candidate)