2026-08-03 20:49:22 +02:00
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---
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policy_id: trsl:policy:linear-longstop-v0@1.0
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title: Linear Longstop v0
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---
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# Linear Longstop v0
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Adopted 2026-07-29
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(`workplans/TREV-WP-0007-degeneration-policy-and-canonical-profiles.md`
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T02, maintainer-accepted): confirmed as the v1 norm for the first pilot
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cohort, not merely a Stage 0 pilot placeholder.
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## Definition
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- Remission accrues **only** by time toward a declared **Longstop Date**
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(`specs/OpenQuestions-WorkingDefaults.md` Q8).
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- Between Phase activation `t0` and Longstop `tL`,
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R(t) = T0 × clamp((t − t0)/(tL − t0), 0, 1)
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with discrete ledger `remission-credit` entries computed on a published
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schedule (e.g. daily or monthly UTC), **or** a single full remission at
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longstop for minimal implementations.
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- Development Credit does not change the remission schedule in v0 (no
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progress-sensitive boost/pause).
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## Status
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2026-08-05 16:00:06 +02:00
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Automated as of WP-0013 (`src/target_revenue/remission.py`):
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- Pure cumulative formula: `cumulative_remission(T0, t0, tL, as_of)`.
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- Hosted apply writes the delta
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`max(0, R(as_of) − Σ policy remission-credit already on the ledger)`.
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- **t0** = Trust Service `phase_manifests.registered_at` (no separate
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`activated_at` manifest field in Stage 0).
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- **Cadence**: monthly UTC (1st 00:00) for scheduled batch
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(`POST /remission/run`); on-demand via
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`POST /phases/{id}/remission` or Control Plane "Apply policy remission now".
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- **Actor**: Licensor credential labeled `system:policy-engine`
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(not a human token).
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- Re-runs at the same `as_of` are no-ops (idempotent by cumulative delta).
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2026-08-03 20:49:22 +02:00
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## Superseded / next iteration
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`specs/TargetDegenerationPolicyResearch.md` (T01) proposes a candidate
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`trsl:policy:progress-paused-longstop-v1` (a 90-day rolling "quiet
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period" pause on Remission Credit during active Development Credit
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periods), research complete but **not adopted**. Explicitly recommends
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*not* adopting a diversity-of-payers factor (no gaming-resistant signal
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exists yet). Named as the next iteration, to be revisited once real
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pilot Development Credit data exists — not required before pilot Phases
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proceed under v0.
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