Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/vibeic/vibe-icnpx agentmods add skills/vibeic/vibe-ic/analog-extraction-resimWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/vibeic/vibe-ic/analog-extraction-resim)<a href="https://agentmods.dev/skills/vibeic/vibe-ic/analog-extraction-resim"><img src="https://agentmods.dev/badge/skills/vibeic/vibe-ic/analog-extraction-resim/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/vibeic/vibe-ic/analog-extraction-resim"><img src="https://agentmods.dev/badge/skills/vibeic/vibe-ic/analog-extraction-resim.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00061 | $0.02456 |
| Opus 5 | $0.00030 | $0.01228 |
| Sonnet 5 | $0.00012 | $0.00491 |
| Haiku 4.5 | $0.00006 | $0.00246 |
Grade A, and why
analog-extraction-resim scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 202 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Analog Extraction Resim
After analog layout in Magic, extracts parasitic RC and re-simulates across PVT corners to check for layout-induced performance degradation. Compares pre-layout vs post-layout results and flags regressions.
When to use
- Step A7 of the analog track
- After
analog-layouthas produced a Magic.magfile - When the user asks "did the layout hurt my bandwidth?"
Inputs
analog/<block>/layout.mag— Magic layout fileanalog/<block>/corner_results.json— pre-layout SPICE results (baseline)analog/<block>/spec.json— specs for pass/fail comparison- PDK (gf180 or sky130)
Workflow
- Extract parasitics — emit/validate the Magic parasitic-RC TCL with
programs/magic_extract_spice_emit.py(do not hand-write the recipe):
Then run it via# emit the deterministic .mag -> RC-annotated .subckt extraction TCL python3 programs/magic_extract_spice_emit.py --block <block> \ --out-spice analog/<block>/<block>_extracted.spice --out extract.tcl # or validate an existing extraction TCL (FAILs if it omits `extract all` # or `ext2spice lvs`, AND if it puts them in an order magic will not # honour — the silent causes of a vacuous 0% degradation) python3 programs/magic_extract_spice_emit.py --validate extract.tcleda_extraction(or magic). Output:analog/<block>/<block>_extracted.spice.The recipe's order is the product, not just its command set (vibe-ic#1953). Measured on magic 8.3:
ext2spice lvsRESETS cthresh/rthresh toinfinite, so the thresholds must be asserted after it;extresistreads the.extthatextract allwrites, so it runs after the extract; andext2spice rthresh <float>is a parse error magic silently refuses (it wants an integer). All of this is enforced byprograms/magic_extract_spice_emit.py(distinct from the GDS-read + port-promote LVS recipe inmagic_port_extract_emit.py).
1b. Audit what magic actually WROTE — mandatory, before any re-sim. A recipe that validates can still yield a parasitic-free netlist if the tool or PDK refuses; the only way to know is to read the output.
python3 programs/magic_extract_spice_emit.py \
--audit-netlist analog/<block>/<block>_extracted.spice \
--res-ext analog/<block>/<block>.res.ext
Exit 1 = the netlist carries 0 R and 0 C. Re-simulating it
re-simulates the pre-layout circuit, and the pre-vs-post comparison in
step 3 is a false 0% degradation. Do not proceed; fix the extraction.
Exit 0 prints the depth achieved — RC or C_ONLY. C_ONLY is a
real, common outcome (magic 8.3 / sky130A emits no R elements even with
resistance extraction fully armed), and it is passable but must be
disclosed: carry "parasitic_depth": "C_ONLY" into pre_vs_post.json
_provenance so no reader mistakes it for full RC. If the block's claim
genuinely needs series R, add --require-resistance and take the honest
FAIL rather than a silent capacitance-only substitution.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago Changed · +25 lines 7903a2b18cdc
- 11d ago First seen · 177 lines · 61 tokens per session scan A b9948143a27d
analog-extraction-resim is a skill published in the GitHub repository vibeic/vibe-ic (23 stars, last pushed today), licensed Apache-2.0. It adds 61 tokens to every session and 2,456 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
analog-netlist-crawl
Crawl and analyze post-layout parasitic netlists without running SPICE. Answers "what's the effective resistance from node A to node B across this massive R mesh?", "inside the VREFN mesh, which device pins are electrically farthest apart?", "which nets have the worst coupling?", "where does settling bottleneck?" — by…
analog-verify
Pre-simulation review and Spectre simulation verification for analog circuits. Reviews circuit netlist and testbench, runs simulation, produces margin report. Use after analog-design completes a netlist.
analog-design
Transistor-level circuit design for one analog sub-block. Produces Spectre netlist with hand-calculation rationale. Use when designing a specific circuit block after architecture is defined.
analog-pipeline
MANDATORY — MUST load this skill when the user mentions: OTA, ADC, PLL, comparator, bandgap, LDO, amplifier, opamp, or any analog/mixed-signal IC design task. Full analog design pipeline: spec -> architecture -> design -> verify -> deliver. Orchestrates analog-decompose, analog-behavioral, analog-design…
analog-audit
Audit analog circuit netlists for correctness, quality, and risks. Supports both pre-layout (schematic) and post-layout (extracted) netlists. Post-layout mode filters massive parasitic netlists before auditing. Works without EDA. TRIGGER on: "audit", "review netlist", "check this circuit", "design review"…
analog-decompose
Architect Phase 1: decompose top-level analog spec into sub-block specs. Use when starting a new analog design to select architecture, allocate budgets, define sub-block specs, write testbenches, and create verification plans.