docs: propose ADR-0108 sequencing for currently-Proposed ADRs (#111)

Makes the post-ADR-0105 sequencing of ADR-0080 / 0084 / 0087 / 0106
explicit, durable, and revisable. Status: Proposed. No content of the
four sequenced ADRs is modified — sequencing is meta, not content.
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# ADR-0108 — Proposed-ADR Sequencing Post-ADR-0105
**Status:** Proposed
**Date:** 2026-05-22
**Author:** CORE agents + reviewers
**Relates to:** ADR-0080, ADR-0084, ADR-0087, ADR-0106
---
## Context
After ADR-0105, the ADR index carries four Proposed-but-not-Accepted ADRs:
| ADR | Proposed | Origin |
|---|---|---|
| ADR-0080 | 2026-05-20 | Contemplation loop (self-interrogation, read-only Phase 1) |
| ADR-0084 | 2026-05-20 | Definitional layer for lexicon packs (optional per-entry block) |
| ADR-0087 | 2026-05-20 | Rhetorical style as a third substantive selection axis |
| ADR-0106 | 2026-05-22 | Expert-demo promotion contract |
Three of these (0080 / 0084 / 0087) were proposed in a single 2026-05-20
session and have not advanced. The frontier work since that day went into
the ADR-0091→0105 evidence-governed domain chain (a different axis), so
the stall is *orthogonal scope*, not contradiction or rejection.
`docs/decisions/README.md` currently states "No ADR currently sits in a
'Proposed but unimplemented' state." That sentence is no longer true and
the README will need updating once this sequencing decision is accepted.
Without an explicit sequencing decision, three things happen:
1. The Proposed-ADR list grows without external legibility.
2. Reviewers cannot tell *intent to land* from *intent to defer* from
*intent to withdraw*.
3. Future "what's next?" questions re-derive sequencing on every read,
which is wasted work and drifts over time.
ADR-0108 makes the sequencing decision explicit, durable, and revisable.
---
## Decision
### 1. Priority order
The four currently-Proposed ADRs are sequenced as follows:
1. **ADR-0106 — Expert-Demo Promotion Contract.** *Highest priority.*
Domain-legibility: the four `reasoning-capable` ratifications overstate
what the system has demonstrated until `expert_demo` has a real
contract. Implementation PR follows acceptance.
2. **ADR-0107 — `mathematics_logic` expert-demo promotion (reserved).**
First worked promotion against the ADR-0106 contract. Smallest
expert-demo proof surface across the four ratified domains.
3. **ADR-0080 — Contemplation Loop.** *Next-most-load-bearing.* Converts
gap-finding from human-driven to system-emitted-and-reviewed.
Phase 1 is intentionally read-only and `SPECULATIVE`-only. Unlocks
curriculum growth speed.
4. **ADR-0084 — Definitional Layer.** *Deferred pending ADR-0107.* The
definitional block is content-shaped; its value surfaces during a
worked expert promotion when definitional depth becomes a bottleneck.
Holding it Proposed avoids premature schema commitment.
5. **ADR-0087 — Rhetorical Style Axis.** *Lowest current priority.*
Register + anchor-lens already demonstrate the orthogonality pattern
ADR-0087 generalizes. No active pull from a downstream consumer.
Stays Proposed until a concrete consumer ADR motivates it.
### 2. No withdrawals
This ADR withdraws none of 0080 / 0084 / 0087. Each remains Proposed and
intact. Sequencing ≠ rejection.
### 3. Sequencing is revisable
Acceptance of ADR-0108 does not freeze the order. The order is the
*current* best guess; new evidence (a worked promotion that hits a
definitional bottleneck, a downstream rhetorical-style consumer landing,
an unanticipated capability gap) updates the order by a follow-up ADR.
### 4. README discipline
The README "Current frontier" section MUST list every Proposed ADR with
its sequencing rank and one-line rationale, so outside readers can see
intent without reading every ADR body. The sentence "No ADR currently
sits in a 'Proposed but unimplemented' state" is removed when this ADR
lands and is replaced with the sequenced Proposed-ADR list.
---
## Invariants
### `proposed_adr_index_complete`
Every ADR with `Status: Proposed` in `docs/decisions/` must appear in the
README "Current frontier" sequencing list. A Proposed ADR absent from the
sequencing list is a documentation drift bug.
### `no_silent_withdrawal`
A Proposed ADR may move to `Withdrawn` only by a successor ADR that
explicitly cites it. No silent deletion.
### `sequencing_is_revisable`
Acceptance of ADR-0108 does not lock the order. A subsequent ADR may
re-rank Proposed ADRs by citing this one and stating the trigger.
---
## Acceptance evidence
Accepted when the following land together:
- README "Current frontier" updated to:
- remove the "No ADR currently sits in a 'Proposed but unimplemented'
state" claim
- add the ranked Proposed-ADR list with one-line rationales matching
§Decision
- this ADR's status flipped to Accepted
- no body content of ADR-0080 / 0084 / 0087 / 0106 is modified by this PR
(sequencing is a meta-decision, not a content edit)
---
## Consequences
- "What's next?" becomes a one-screen read on `docs/decisions/README.md`
rather than a four-file scan plus reasoning.
- Reviewers can act on Proposed ADRs in declared order without
cross-checking session memory.
- Proposed ADRs that genuinely no longer fit get a documented exit via
a successor ADR rather than disappearing from the index.
- Future "candidate frontier" bullets in the README become the on-ramp
to a new Proposed ADR, with this sequencing list as their next stop.
---
## Out of scope
- This ADR does not implement any of the four Proposed ADRs.
- This ADR does not modify ADR-0080 / 0084 / 0087 / 0106 bodies.
- Multi-reviewer governance (the open ADR-0105 candidate frontier item)
is orthogonal and remains future work.

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@ -26,6 +26,7 @@ ADRs record significant architectural decisions: what was decided, why, what alt
| [ADR-0104](ADR-0104-curriculum-sourced-teaching-proposals.md) | Curriculum-Sourced Teaching Proposals | Accepted (2026-05-22) |
| [ADR-0105](ADR-0105-sealed-holdout-encryption.md) | Sealed Holdout Encryption via age | Accepted (2026-05-22) |
| [ADR-0106](ADR-0106-expert-demo-promotion-contract.md) | Expert-Demo Promotion Contract | Proposed (2026-05-22) |
| [ADR-0108](ADR-0108-proposed-adr-sequencing.md) | Proposed-ADR Sequencing Post-ADR-0105 | Proposed (2026-05-22) |
---