test-driver/research/concepts/fitness-map.md
tegwick 84848e9a0e T08: the classifier, measured and attacked
False Adaptation Rate = 0/7 across the labelled catalogue and the three E-003
attacks. 11 of 12 mechanical mutations absorbed without a human, so the safety
result is not bought by escalating everything.

- classification.py: total function over three signals, rule order chosen so
  every rule that could excuse a regression sits after the rule that reports
  one. SAFE_TO_ACCEPT is a two-element closed set, asserted.
- CompositeDriver plus scenarios/full_journey.py: one asset crossing both
  surfaces, so UI mutations are visible as surface differences while the
  claims they do not touch stay green.
- E-003: surface substitution (new M23), concurrent mechanical+defect,
  evidence starvation, provenance laundering. All held.

F-0006 (CONCEPT_DRIFT, resolved): the T02 design listed SEMANTIC_CHANGE as an
outcome the table could produce. It cannot - M12 and M19 are behaviourally
identical, as the lab has asserted since T05. PRODUCT_DEFECT and
SEMANTIC_CHANGE collapse into one escalating outcome, BEHAVIOUR_CHANGED, and
the distinction becomes a human adjudication. INTENT_CHANGED survives but is
detected by the claim fingerprint moving, not inferred from behaviour.

Two classifier defects found and fixed rather than reported: claims downstream
of a failed realization now yield INCONCLUSIVE rather than FAIL (a false
accusation is the mirror image of a false adaptation), and the browser driver
records a page signature so surface change is detectable when the interaction
path is unchanged.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 1629012@bnt-lap001
Assistant-Session: 78d4fb13-8a1e-474b-87a3-9b9261c49a39
2026-08-23 00:02:58 +02:00

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Markdown

# Concept ↔ Implementation Fitness Map
**Updated:** 2026-08-22 (TD-WP-0002-T08)
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` | — | — | Is a use case expressible without leaking mechanics? |
| `C-actor-isolation` | C1 | `world.py` | E-001 | `td://self/actor-isolation` | **F-0003** — only observable when the scenario plants canaries. |
| `C-semantic-action` | **C2** | `actions.py`, `agentic.py` | E-001 (partial) | T07 arm comparison | **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 | 11/12 mechanical absorbed without a human. |
| `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` | C1 | — (T09) | E-002 | — | (H-003) |
| `C-intent-provenance` | C1 | `provenance.py` | E-003 | `td://self/intent-independence` | Constrains provenance, not quality. Accepted residual. |
| `C-lineage` | C0 | — | — | — | Parent pointer only in the spike. |
| `C-energy` | C0 | `energy.py`, capture only | — | — | Dormant by decision. (H-005) |
| `C-temperature` | C0 | — | — | — | Deferred. No implementation planned in TD-WP-0002. |
| `C-confidence` | C0 | — | — | — | Deferred. |
| `C-campaign` | C0 | — | — | — | Deferred. |
| `C-metabolism` | C0 | — | — | — | Deferred. Depends on C-energy. |
| `C-retirement` | C0 | — | — | — | Deferred. Depends on C-energy. |
| `C-security-mutation` | C1 | `lab/mutations.py` | E-003 | `lab/GROUND-TRUTH.md` | Catalogue is hand-written; no derivation mechanism from use cases yet. |
## Orphan check
**Conceptual orphans** — concepts with no planned implementation in `TD-WP-0002`:
`C-temperature`, `C-confidence`, `C-campaign`, `C-metabolism`, `C-retirement`.
All five are deferred *by explicit decision*, not oversight. They are the group
most at risk of being built because they are easy and satisfying, and never
validated. They are revisited at T10, where the question is not "when do we build
these" but "does the evidence justify keeping them in the model at all".
**Implementation orphans** — none. Every module in `src/testdriver/` traces to a
concept above. `energy.py` is the one to watch: it exists solely to capture
events for a dormant hypothesis, and if T10 finds no use for the history it
should be removed rather than kept out of sentiment.