canhelp
Given a canister ID or name in $ARGUMENTS, fetch and summarize its Candid interface.
Steps
-
Resolve the canister ID by running the resolve script from the skill's base directory:
./scripts/resolve-canister-id.sh "$ARGUMENTS"If
$ARGUMENTSis already a valid principal, the script echoes it back. Otherwise, it queries the IC Dashboard API and outputs matches as<canister-id> <name>(one per line).- If there is a single result, clearly display the resolved canister ID and use it directly.
- If there are multiple results, present the list to the user and ask them to pick one before continuing.
-
Fetch the Candid interface using the resolved canister ID:
./scripts/fetch-candid.sh <resolved-canister-id>The script outputs the path to the downloaded
.didfile.
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126stable-memory
Persist canister state across upgrades. Covers StableBTreeMap and MemoryManager in Rust, persistent actor in Motoko, and upgrade hook patterns. Use when dealing with canister upgrades, data persistence, data lost after upgrade, stable storage, StableBTreeMap, pre_upgrade traps, or heap vs stable memory. Do NOT use for inter-canister calls or access control — use multi-canister or canister-security instead.
121https-outcalls
Make HTTPS requests from canisters to external web APIs. Covers transform functions for consensus, cycle cost management, response size limits, and idempotency patterns. Use when a canister needs to call an external API, fetch data from the web, or make HTTP requests. Do NOT use for EVM/Ethereum calls — use evm-rpc instead.
121canister-security
IC-specific security patterns for canister development in Motoko and Rust. Covers access control, anonymous principal rejection, reentrancy prevention (CallerGuard pattern), async safety (saga pattern), callback trap handling, cycle drain protection, and safe upgrade patterns. Use when writing or modifying any canister that modifies state, handles tokens, makes inter-canister calls, or implements access control.
119