# SA-EDA-VSLICE-004 - Open-Silicon Model-to-Measurement Evidence Ladder

Version: 2026-08-22-v93

## Purpose

Teach how a semiconductor claim changes as it moves from model assumptions through cell characterization, implementation reports, test-structure planning, measurement evidence, discrepancy review, and uncertainty-aware claim maturity.

This package is an original synthetic teaching model. It does not reproduce the external repository, its designs, reports, layouts, libraries, PDK content, or measurements.

## Source observation

- Repository: [JoonatanAlanampa/vertical-slice](https://github.com/JoonatanAlanampa/vertical-slice)
- Pinned observed commit: `318eac27ebedc990af5680c8a969164709545eca`
- Observed license metadata: `Apache-2.0`
- Use mode: pinned_link_and_metadata_only
- Claim status: repository_author_claims_not_independently_reproduced_by_semiagora
- Copied repository files: 0
- Copied external numeric results: 0

## Deterministic sweep

4 model bases x 4 characterization states x 4 implementation checkpoints x 4 test-structure states x 4 measurement states x 4 review roles = 4096 rows.

## Numeric contract

- Every predicted delay, ring-frequency, observed-delay, discrepancy, coverage, readiness, uncertainty, and maturity value is an original deterministic teaching proxy.
- Synthetic observed fields appear only in rows labeled `synthetic_teaching_pair`.
- Every row contains `real_measurement_rows_used = 0` and `external_numeric_values_used = 0`.
- Empty owned slots describe the schema needed for replacement evidence; they do not assert that owned reports or measurements exist.
- Comparison and claim-maturity scores are review aids, not pass/fail limits, signoff criteria, or performance rankings.

## Gate coverage

- model_characterization_required: 32
- external_author_claim_reproduction_required: 1792
- cross_stage_contradiction_review: 240
- test_structure_definition_required: 144
- implementation_checkpoint_required: 576
- characterization_checkpoint_mismatch: 480
- measurement_result_missing: 368
- uncertainty_and_conditions_review: 89
- populate_owned_measurement_table: 232
- synthetic_discrepancy_review: 24
- bounded_teaching_comparison: 119

## Local source-review lineage

- `08_references/semiagora_simulation_atlas/DAILY_CONTENT_TRIAGE_2026-08-22_191627.md` - SHA-256 `EF092D57C8861E18EFC06A5DB801A5839314EF30C650960A71D5AC9C3B82ED4E`
- `08_references/semiagora_simulation_atlas/daily_content_triage_2026-08-22_191627.json` - SHA-256 `97DFA853F2970DFB98A34D4BAC2A96382ADAB2AB1E24962B8252FD30800360C7`
- `07_assets/factory_lab/daily/2026-08-22/20260822_191627/FACTORY_RUN.md` - SHA-256 `0728E23829728D3CD884C44CB71E17FB314E36BD50C2C7311D795C7973720F17`
- `07_assets/factory_lab/daily/2026-08-22/20260822_191627/resource_scan/daily_resource_candidates.csv` - SHA-256 `44AF6757325927E45C05449BA9C558E393C13250501DCBDD737AA5901098A6A3`

## Link-only source spine

- [Vertical-slice repository snapshot](https://github.com/JoonatanAlanampa/vertical-slice/tree/318eac27ebedc990af5680c8a969164709545eca) - Pinned primary repository snapshot used only as a link-first evidence-chain benchmark. Repository statements remain author claims until independently reproduced.
- [Vertical-slice Apache-2.0 license](https://github.com/JoonatanAlanampa/vertical-slice/blob/318eac27ebedc990af5680c8a969164709545eca/LICENSE) - License observation for the pinned repository snapshot. SemiAgora still mirrors no repository code, GDS, Liberty, reports, PDK data, or measurements.
- [ngspice official documentation](https://ngspice.sourceforge.io/docs.html) - Official simulator documentation anchor for model, netlist, transient, and characterization vocabulary; no deck or output is copied.
- [Yosys official documentation](https://yosyshq.readthedocs.io/projects/yosys/en/latest/) - Official RTL synthesis and technology-mapping vocabulary anchor; no design, script, netlist, or library is ingested.
- [OpenROAD Flow Scripts tutorial](https://openroad-flow-scripts.readthedocs.io/en/latest/tutorials/FlowTutorial.html) - Official RTL-to-GDS checkpoint and report-directory vocabulary anchor; report values and examples are not copied.
- [OpenSTA official documentation](https://openroad.readthedocs.io/en/latest/main/src/sta/README.html) - Official STA input, timing-check, and report vocabulary anchor; no Liberty, SDC, SPEF, netlist, or timing report is copied.
- [OpenRCX official documentation](https://openroad.readthedocs.io/en/latest/main/src/rcx/README.html) - Official parasitic-extraction vocabulary anchor; no extraction rules, SPEF, design database, or measured RC is copied.
- [Tiny Tapeout official guides](https://tinytapeout.com/guides/) - Official public guide index for hardening, bring-up, documentation, and measurement context; no project asset or test result is copied.
- [SkyWater SKY130 PDK documentation](https://skywater-pdk.readthedocs.io/en/main/) - Official open-PDK status and boundary anchor. SemiAgora redistributes no PDK, model, rule deck, cell library, or process content.
- [NIST measurement uncertainty](https://www.nist.gov/itl/sed/topic-areas/measurement-uncertainty) - Authoritative measurement-model and uncertainty context for comparison readiness; no external measurement table is copied.

## Public boundary

- No repository mirroring, source-code reuse, GDS, Liberty, PDK, model deck, report body, screenshot, figure, or external measurement-table copying.
- Repository statements are preserved only as pinned author-claim metadata and are not independently reproduced or endorsed by SemiAgora.
- No live ngspice, Yosys, OpenROAD, OpenLane, LibreLane, OpenSTA, OpenRCX, Magic, Netgen, KLayout, or Tiny Tapeout flow execution.
- No uploaded design, model, library, PDK, netlist, GDS, DEF, LEF, SDC, SPEF, Liberty, report, bring-up log, or measurement parsing.
- All numeric prediction and comparison fields are original synthetic teaching proxies; the replay contains zero real measurement rows and zero external numeric results.
- No tapeout or fabrication service, signoff certification, measurement claim, silicon-performance claim, product claim, foundry claim, or project endorsement.