design-for-eco SKILL.md skillA
design-for-eco from vibeic/vibe-ic is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add vibeic/vibe-ic/design-for-eco@git:20260822.6dd9761Pins git:20260822.6dd9761 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- vibeic/vibe-ic
- Path
vibe-ic-marketplace/plugins/vibe-ic/skills/design-for-eco/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260822.6dd9761, committed Aug 22, 2026
- First version recorded
- Jun 13, 2026
- Size
- 10,008 bytes
- Repository stars
- 32
- License
- Apache-2.0
Design-for-ECO methodology — pre-place a distributed pool of tied-off spare standard cells/gates and reserve spare ECO pads so that a late-stage bug can be fixed with a cheap metal-only ECO instead of a full base-layer respin. Covers WHY (metal-only vs base-layer respin cost), WHAT to insert (inverter/nand2/nor2/dff/mux2/aoi/oai mix, ~1-5% density, tie-offs, even spatial distribution, reserved ECO pads), WHERE in the flow (after placement, before CTS), ECO-aware metal fill, and the HARD…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Design-for-ECO — spare-cell / spare-gate / spare-pad readiness A taped-out chip will, sooner or later, need a fix: a missed timing path, a logic bug found in bring-up, a metal-mask trim. The cheapest possible fix is a **metal-only ECO** — reusing already-placed transistors and only re-spinning a few metal/via masks. The most expensive is a **base-layer respin** — new diffusion/poly masks, a full mask set, weeks of fab time. Design-for-ECO is the discipline of *pre-investing* a small amount of silicon area, BEFORE tape-out, so that future fixes stay in the cheap (metal-only) regime. This skill is **chip-AGNOSTIC**: it describes the methodology and the hard preservation rule; the deterministic insertion + verification is owned by the phase3 stage3 Design-for-ECO step and its two checkers (see *Flow integration*). ## Why pre-place spare cells/gates + reserve spare pads | Fix vehicle | Masks touched | Relative cost / turn time | Needs spares? | |---|---|---|---| | Metal-only ECO | a few metal + via | low — days, partial mask set | **yes** — must reuse existing transistors | | Base-layer ECO | poly/diffusion + all above | high — weeks, full mask set | no (but expensive) | …
Read the whole file at its exact version.
How to install
mdr add vibeic/vibe-ic/design-for-eco@sha256:a5c1ce9e0238198eThe line at the top of this page pins the label git:20260822.6dd9761, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_pomak7vj2rm6ues5)
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Versions
The registry has recorded 2 versions of this file, between Jun 13, 2026 and Aug 22, 2026, about one every 70 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260822.6dd9761 latest | 2026-08-22 | 6dd9761 | 10,008 B | A | view · diff |
| git:20260613.86cacb4 | 2026-06-13 | 86cacb4 | 9,634 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10008 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
vibeic/vibe-ic · 32 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pomak7vj2rm6ues5 GET https://markdownregistry.com/api/v1/resolve?ref=vibeic/vibe-ic/design-for-eco GET https://markdownregistry.com/api/v1/blob/a5c1ce9e0238198e46f29bf50dfecf03666a4d250fc596f351c0d5f224ee26e4
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.