---
policy_id: trsl:policy:linear-longstop-v0@1.0
title: Linear Longstop v0
---

# Linear Longstop v0

Adopted 2026-07-29
(`workplans/TREV-WP-0007-degeneration-policy-and-canonical-profiles.md`
T02, maintainer-accepted): confirmed as the v1 norm for the first pilot
cohort, not merely a Stage 0 pilot placeholder.

## Definition

- Remission accrues **only** by time toward a declared **Longstop Date**
  (`specs/OpenQuestions-WorkingDefaults.md` Q8).
- Between Phase activation `t0` and Longstop `tL`,

  R(t) = T0 × clamp((t − t0)/(tL − t0), 0, 1)

  with discrete ledger `remission-credit` entries computed on a published
  schedule (e.g. daily or monthly UTC), **or** a single full remission at
  longstop for minimal implementations.
- Development Credit does not change the remission schedule in v0 (no
  progress-sensitive boost/pause).

## Status

Not yet automated — see
`workplans/TREV-WP-0013-remission-credit-automation.md`. Nothing in this
codebase currently computes or writes these entries; this file is the
formula those entries must be checkable against once that workplan lands.

## Superseded / next iteration

`specs/TargetDegenerationPolicyResearch.md` (T01) proposes a candidate
`trsl:policy:progress-paused-longstop-v1` (a 90-day rolling "quiet
period" pause on Remission Credit during active Development Credit
periods), research complete but **not adopted**. Explicitly recommends
*not* adopting a diversity-of-payers factor (no gaming-resistant signal
exists yet). Named as the next iteration, to be revisited once real
pilot Development Credit data exists — not required before pilot Phases
proceed under v0.