mr-fang-vlsi/bspdn-pdn-sufficiency-evaluator

BSPDN PDN Sufficiency Evaluator

Use this skill when the question is "is the current PDN contract strong enough?" rather than "did backside signal routing help?"

When to use

Use this skill when:

1. the project needs to decide whether BPR + current backside PDN is sufficient,
2. PDN weakness may be confounding backside-signal conclusions,
3. Strict-BPR, PDN-boost, or Stress-check comparisons need a dedicated evaluator,
4. PDN stability must be judged without letting signal use BPR.

Scope boundary

This skill owns:

• PDN sufficiency judgments under the current BSPDN contract,
• separating PDN strength questions from signal-routing benefit questions,
• deciding whether the issue is likely PDN under-strength vs topology invalidity vs case unsuitability.

It does not own:

• redefining the physical contract itself without bspdn-physical-contract-auditor,
• benefit attribution across front-only / CTS-backside-only / partial-signal-backside,
• general execution orchestration.

Core experiment family

Use this family by default:

1. Strict-BPR
2. PDN-boost
3. Stress-check

Expected outputs

1. *.results.tsv
2. *.conclusion.md
3. optional *.experience_delta.md

Hard rules

1. Never answer "PDN is weak" by letting signal use BPR; that changes the question.
2. Keep BPR-reserved-for-PDN intact unless the physical contract is separately overturned.
3. Distinguish:

• PDN connectivity/stability evidence
• timing side effects
• congestion side effects

4. A better PDN-boost result implies "strengthen PDN", not "relax the signal contract".

Operational references

1. Load references/background-knowledge-links.md for the current summarized PDN-sufficiency knowledge contract.
2. Load references/update-mechanism.md when deciding whether the evaluator's assumptions or pass/fail criteria need refresh.