diff --git a/.claude/skills/ext/solana-tx-debugger b/.claude/skills/ext/solana-tx-debugger
new file mode 160000
index 0000000..4268e79
--- /dev/null
+++ b/.claude/skills/ext/solana-tx-debugger
@@ -0,0 +1 @@
+Subproject commit 4268e7907061e1def5be3b6f4598d8c54ef16d3c
diff --git a/.claude/skills/skill-registry.json b/.claude/skills/skill-registry.json
index b36f118..7f5fe5a 100644
--- a/.claude/skills/skill-registry.json
+++ b/.claude/skills/skill-registry.json
@@ -572,6 +572,21 @@
       "safety": "clean — community index, not first-party-vetted; verify each entry before installing",
       "tags": ["aggregator", "scout", "plugins", "community", "discovery"]
     },
+    {
+      "id": "solana-tx-debugger",
+      "name": "Solana TX Debugger Skill",
+      "type": "skill",
+      "domain": "solana-infra",
+      "description": "Diagnose failed Solana transactions: decode error codes (Anchor, SPL, Token-2022, System), identify root cause from logs and CPI depth, and prescribe concrete fixes with code snippets. Includes 22+ real-world error recipes, compute budget optimization, ALT/versioned tx guidance, and simulation-based pre-send debugging.",
+      "source": "https://github.com/thesithunyein/solana-tx-debugger-skill",
+      "install": { "method": "submodule", "command": "git submodule add https://github.com/thesithunyein/solana-tx-debugger-skill .claude/skills/ext/solana-tx-debugger", "env": [] },
+      "license": "MIT",
+      "maintainer": "thesithunyein",
+      "signal": { "stars": null, "last_commit": "2026-06-22", "reputability": "individual" },
+      "default_installed": false,
+      "safety": "clean — pure markdown skill, no scripts/binaries beyond standard install.sh",
+      "tags": ["debugging", "error-codes", "anchor", "spl", "token-2022", "compute-budget", "cpi", "alt", "simulation", "solana"]
+    },
     {
       "id": "nansen-mcp",
       "name": "Nansen",
diff --git a/.gitmodules b/.gitmodules
index 123ce4a..9c695ca 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -52,3 +52,6 @@
 [submodule ".claude/skills/ext/eth-to-sol"]
 	path = .claude/skills/ext/eth-to-sol
 	url = https://github.com/solana-foundation/eth-to-sol-skill
+[submodule ".claude/skills/ext/solana-tx-debugger"]
+	path = .claude/skills/ext/solana-tx-debugger
+	url = https://github.com/thesithunyein/solana-tx-debugger-skill.git
diff --git a/README.md b/README.md
index 90aa427..f2dbdd7 100644
--- a/README.md
+++ b/README.md
@@ -132,6 +132,7 @@ The two paths are complementary: individuals wanting Solana agents/commands acro
 | `ext/helius` | [helius-labs/core-ai](https://github.com/helius-labs/core-ai) | Official Helius infra skill + unique SVM internals skill |
 | `ext/quicknode-anchor` | [quiknode-labs/solana-anchor-claude-skill](https://github.com/quiknode-labs/solana-anchor-claude-skill) | Anchor/financial-math/Quasar reference files (quarantined — refs only) |
 | `ext/eth-to-sol` | [solana-foundation/eth-to-sol-skill](https://github.com/solana-foundation/eth-to-sol-skill) | EVM/Solidity → Anchor two-pass porting |
+| `ext/solana-tx-debugger` | [thesithunyein/solana-tx-debugger-skill](https://github.com/thesithunyein/solana-tx-debugger-skill) | Diagnose failed Solana transactions: decode error codes, identify root cause, prescribe fixes (Anchor, SPL, Token-2022, compute budget, CPI, ALTs) |
 
 ### Agent Teams