# Concept ↔ Implementation Fitness Map

**Updated:** 2026-09-28 (TD-WP-0003-T02/T03/T04)

Traces each important concept to the implementation, experiment and evidence that
support it. **Unsupported entries are the point of this map** — a concept with no
implementation and no evidence is not a gap to be embarrassed about, it is the
current honest state, and hiding it defeats the map's purpose.

Support levels follow `TestDriverImprovementLoop.md` §13:
`C0 Idea` · `C1 Hypothesis` · `C2 Experimentally Supported` ·
`C3 Practically Validated` · `C4 Architectural Invariant`

## Current state

`C-semantic-action` is the first concept to reach `C2`: it has an experiment
behind it (the T07 two-arm comparison), and that experiment narrowed the claim
rather than confirming it. Everything else still rests on unit tests.

The deterministic kernel exists (T04) and its guarantees are covered by unit
tests. **Levels do not move for those.** A passing unit test is not an experiment: it
shows the code does what its author intended, not that the concept holds under
the mutations it claims to survive. Levels rise when E-001/E-002/E-003 produce
evidence, not before. The implementation column below moves; the level column
does not. The initial classifications in §13 of the Improvement Loop
(`Actor Isolation C2`, `Independent Oracles C2`) are corrected downward here: they
were aspirational, not evidenced.

| Concept | Level | Implementation | Experiment | Evidence | Open question |
|---|---|---|---|---|---|
| `C-use-case` | C1 | `intent.py`, three reference scenarios | T02 | `tests/test_generalisation.py` | Three synthetic use cases fit; external authoring still unmeasured. |
| `C-actor-isolation` | **C2** | `world.py`, `runner.py` | E-001 | `td://self/actor-isolation`, examined every run | **F-0003 resolved** — automatic canaries; observable on every scenario. |
| `C-semantic-action` | **C2** | `actions.py`, `agentic.py` | E-001 | 2026-09-28 two-arm receipt | **F-0005** — supported only where stable identifiers are absent. Narrower than the concept model claims. |
| `C-oracle-independence` | **C2** | `runner.py`, `oracles.py` | E-001, E-003 | — | Independence of components ≠ independence of belief. (H-004) |
| `C-evidence-pack` | C1 | `evidence.py` | — | `td://self/evidence-reproducibility` | Verdicts are reproducible from S3 alone, on passing and failing runs. |
| `C-observation-channel` | C1 | `lab/app.py` | — | — | **D-07** — required of every system under test. Adoption cost unknown. |
| `C-adaptation` | **C2** | `classification.py`, `agentic.py` | E-001 | T08 matrix | 26/27 mechanical absorbed; ten dropped-id cases now included. |
| `C-classification` | **C2** | `classification.py` | E-001, E-003 | T08 matrix, FAR 0/7 | **F-0006** — cannot infer SEMANTIC vs DEFECT; collapses to one escalating outcome. |
| `C-crystallization` | **C2** | `crystallization.py` | E-002 | T09 agreement matrix | Fidelity supported; **F-0007** — the economic case is unmeasurable with a token-free runtime. |
| `C-intent-provenance` | C1 | `provenance.py` | E-003 | `td://self/intent-independence` | Constrains provenance, not quality. Accepted residual. |
| `C-lineage` | C1 | `scenario.py`, generated headers | E-002 | generated module docstring | Parent pointer plus provenance in the artefact; no graph. |
| `C-energy` | Removed | — | T04 | Generalisation review | No demonstrated decision; not an implementation promise. |
| `C-temperature` | Removed | — | T04 | Generalisation review | No demonstrated decision; not an implementation promise. |
| `C-confidence` | Removed | — | T04 | Generalisation review | No demonstrated decision; not an implementation promise. |
| `C-campaign` | Removed | — | T04 | Generalisation review | No demonstrated decision; not an implementation promise. |
| `C-metabolism` | Removed | — | T04 | Generalisation review | No demonstrated decision; not an implementation promise. |
| `C-retirement` | Removed | — | T04 | Generalisation review | No demonstrated decision; not an implementation promise. |
| `C-security-mutation` | C1 | `lab/mutations.py` | E-003 | `lab/GROUND-TRUTH.md` | Catalogue is hand-written; no derivation mechanism from use cases yet. |

## Generalisation and compression review — 2026-09-28

No new kernel concept was required for delegation/sequencing or tenant lifecycle.
Ordered `Step`s supply the Schedule; scenario `variant` identifies seeded defects.
No independent scheduler or Variant class was needed. Integration/security lenses
remain descriptive groupings; no Lens runtime object was consulted or validated.
The generic observer interface works, but each new domain needs a custom snapshot
collector: observation-channel adoption cost remains a real concern.

Temperature, Energy, Confidence, Campaign, Metabolism and Retirement are removed,
not deferred to another gate. `energy.py`, its exports and evidence field are
removed; H-005 is dormant-indefinite and F-0008 is resolved. Ordinary evidence,
judgments, realization metrics and lineage remain. See
[review](../../docs/TestDriverGeneralisationReview.md) for compatibility and limits.

Previous compression (T10): `Verdict.SUSPICIOUS`, `Step.expect_refusal`,
`ActorIsolationError`, `World.seed`, `EvidencePack.latest()`, `Trajectory.method`.