diff --git a/skills/gmgn-market/SKILL.md b/skills/gmgn-market/SKILL.md
index 5ebf970..ea62a6a 100644
--- a/skills/gmgn-market/SKILL.md
+++ b/skills/gmgn-market/SKILL.md
@@ -1031,12 +1031,6 @@ gmgn-cli market signal --chain sol \
 
 ---
 
-### Credential Model
-
-- `GMGN_PRIVATE_KEY` is used exclusively for **local message signing** — the private key never leaves the machine. The CLI computes an Ed25519 signature in-process and transmits only the base64-encoded result in the `X-Signature` request header.
-- `GMGN_API_KEY` is transmitted in the `X-APIKEY` header over HTTPS.
-- Neither credential is ever passed as a command-line argument.
-
 ## Notes
 
 - `market kline`: `--from` and `--to` are Unix timestamps in **seconds** — CLI converts to milliseconds automatically
diff --git a/skills/gmgn-portfolio/SKILL.md b/skills/gmgn-portfolio/SKILL.md
index c0e117b..8e34488 100644
--- a/skills/gmgn-portfolio/SKILL.md
+++ b/skills/gmgn-portfolio/SKILL.md
@@ -352,12 +352,6 @@ PnL Ratio:       {pnl}x
 
 Show the `[Identity: ...]` line only if `common` is present in the response. For batch queries (multiple wallets), present one summary block per wallet.
 
-### Credential Model
-
-- `GMGN_PRIVATE_KEY` is used exclusively for **local message signing** — the private key never leaves the machine. The CLI computes an Ed25519 signature in-process and transmits only the base64-encoded result in the `X-Signature` request header.
-- `GMGN_API_KEY` is transmitted in the `X-APIKEY` header over HTTPS.
-- Neither credential is ever passed as a command-line argument.
-
 ## Notes
 
 - `portfolio holdings` uses **critical auth** (`GMGN_API_KEY` + `GMGN_PRIVATE_KEY` required — CLI signs the request automatically). All other portfolio commands use exist auth (API Key only, no signature required).
diff --git a/skills/gmgn-token/SKILL.md b/skills/gmgn-token/SKILL.md
index b52cc8b..081f7bc 100644
--- a/skills/gmgn-token/SKILL.md
+++ b/skills/gmgn-token/SKILL.md
@@ -707,12 +707,6 @@ SM holders: {smart_wallets}   KOL holders: {renowned_wallets}
 
 Show top rows only. Highlight wallets tagged `kol`, `smart_degen`, or flagged `bundler` / `rat_trader` in `maker_token_tags`.
 
-### Credential Model
-
-- `GMGN_PRIVATE_KEY` is used exclusively for **local message signing** — the private key never leaves the machine. The CLI computes an Ed25519 signature in-process and transmits only the base64-encoded result in the `X-Signature` request header.
-- `GMGN_API_KEY` is transmitted in the `X-APIKEY` header over HTTPS.
-- Neither credential is ever passed as a command-line argument.
-
 ## Notes
 
 - **Market cap is not returned directly** — calculate it as `price.price × circulating_supply` (`price` is now a nested object; use `price.price` for the current USD price string, and `circulating_supply` is a top-level field already in human-readable token units). Example: `price.price="3.11"` × `circulating_supply=999999151` ≈ $3.11B market cap.
diff --git a/skills/gmgn-track/SKILL.md b/skills/gmgn-track/SKILL.md
index a1f3762..f1d9605 100644
--- a/skills/gmgn-track/SKILL.md
+++ b/skills/gmgn-track/SKILL.md
@@ -369,12 +369,6 @@ To research any token surfaced by smart money activity, follow [`docs/workflow-t
 - **`follow-wallet` reveals your following list** — results expose which wallets you have followed on GMGN. Do not share raw output in public channels.
 - **`track kol` / `track smartmoney` expose no personal data** — these use API Key auth only and return platform-tagged public wallet activity. Safe to share raw output.
 
-### Credential Model
-
-- `GMGN_PRIVATE_KEY` is used exclusively for **local message signing** — the private key never leaves the machine. The CLI computes an Ed25519 signature in-process and transmits only the base64-encoded result in the `X-Signature` request header.
-- `GMGN_API_KEY` is transmitted in the `X-APIKEY` header over HTTPS.
-- Neither credential is ever passed as a command-line argument.
-
 ## Notes
 
 - `track follow-tokens` uses exist auth (API Key only); `--wallet` is required