diff --git a/.changeset/drop-holesky-chain.md b/.changeset/drop-holesky-chain.md
new file mode 100644
index 0000000..c6e65c5
--- /dev/null
+++ b/.changeset/drop-holesky-chain.md
@@ -0,0 +1,9 @@
+---
+"@avaprotocol/protocols": major
+---
+
+Remove `Chains.Holesky` (17000). EigenLayer has sunset Holesky and Ava Protocol's testnet AVS moved to Sepolia, so the constant no longer names a chain anything in this catalog targets.
+
+Nothing in the catalog covered it: no protocol module and no token declared a 17000 entry, so `dist/tokens/holesky.json` was never actually emitted despite the sidecar's filename map and README listing it. The removal drops the constant, its sidecar filename entry, and both doc references.
+
+**Breaking:** `Chains.Holesky` no longer exists. Callers referencing it fail to compile. There is no replacement — use `Chains.Sepolia` (11155111) for testnet work.
diff --git a/README.md b/README.md
index aabc6f2..37459de 100644
--- a/README.md
+++ b/README.md
@@ -203,8 +203,7 @@ dist/tokens/
 ├── sepolia.json        (chain 11155111)
 ├── base.json           (chain 8453)
 ├── base-sepolia.json   (chain 84532)
-├── bnb-mainnet.json    (chain 56)
-└── holesky.json        (chain 17000)
+└── bnb-mainnet.json    (chain 56)
 ```
 
 Each file is a stable-sorted array of `{ id, name, symbol, decimals }` entries — the same schema the EigenLayer-AVS Go aggregator already consumes under `token_whitelist/*.json`, so a Go service can pick up the catalog without depending on the TS toolchain. `id` is the lowercased address (matching Go's read-side normalization). Metadata fields TS consumers use (`description`, `website`, `logoUrl`, `links`) are intentionally omitted; TS callers import the `Tokens` namespace from source instead.
diff --git a/scripts/build-tokens-sidecar.ts b/scripts/build-tokens-sidecar.ts
index 73556e5..209ce2f 100644
--- a/scripts/build-tokens-sidecar.ts
+++ b/scripts/build-tokens-sidecar.ts
@@ -19,7 +19,6 @@
  *   dist/tokens/base.json           — chain 8453
  *   dist/tokens/base-sepolia.json   — chain 84532
  *   dist/tokens/bnb-mainnet.json    — chain 56
- *   dist/tokens/holesky.json        — chain 17000
  *
  * File naming matches the convention EigenLayer-AVS already uses for
  * its checked-in whitelists so the migration path is a one-line
@@ -45,7 +44,6 @@ const CHAIN_FILE_NAMES: Readonly<Record<number, string>> = Object.freeze({
   [Chains.BaseMainnet]: "base",
   [Chains.BaseSepolia]: "base-sepolia",
   [Chains.BnbMainnet]: "bnb-mainnet",
-  [Chains.Holesky]: "holesky",
 });
 
 function buildSidecar(): Record<number, SidecarEntry[]> {
diff --git a/src/chains.ts b/src/chains.ts
index bf174f3..476ffdd 100644
--- a/src/chains.ts
+++ b/src/chains.ts
@@ -10,7 +10,6 @@
 export const Chains = Object.freeze({
   EthereumMainnet: 1 as const,
   Sepolia: 11_155_111 as const,
-  Holesky: 17_000 as const,
   OptimismMainnet: 10 as const,
   UnichainMainnet: 130 as const,
   BaseMainnet: 8453 as const,