Hailstone Sequence
Compute the complete Hailstone sequence for a given starting number by repeatedly calling the next_number tool until the value 1 is reached.
Install
$ agentstack add skill-nerdai-llm-agents-from-scratch-hailstone-sequence ✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.
Security review
✓ PassedNo issues found. Passed automated security review. · v0.1.0 How review works →
- ✓ Prompt-injection patterns
- ✓ Secret / credential exfiltration
- ✓ Dangerous shell & filesystem operations
- ✓ Untrusted network calls
- ✓ Known-malicious package signatures
What it can access
- ✓ Network access No
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Verified badge
Passed review? Show it. Paste this badge into your README, it links to the public security report.
Links to your public security report.[](https://agentstack.voostack.com/security/report/skill-nerdai-llm-agents-from-scratch-hailstone-sequence) Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
Hailstone Sequence
Compute the full Hailstone (Collatz) sequence from a starting number down to 1 using the next_number tool.
Arguments
The user must provide a starting number (a positive integer greater than 1).
If no starting number is given, ask the user before proceeding.
Steps
1. Initialize
Set the current number x to the starting number provided by the user.
Begin tracking the sequence as a list: [x].
2. Call the tool
Call next_number with the current value of x.
next_number(x=)STOP and WAIT for the tool result before continuing.
3. Record the result
Append the returned value to the sequence list.
Set x to the returned value.
4. Check termination
- If
x == 1, proceed to Step 5. - Otherwise, go back to Step 2.
Important rules:
- NEVER fabricate or simulate tool call results.
- NEVER make multiple tool calls in a single response.
- ALWAYS wait for the actual tool response before deciding next steps.
5. Report the result
Print the complete sequence from start to finish, for example:
6 → 3 → 10 → 5 → 16 → 8 → 4 → 2 → 1Also report:
- Starting number
- Total steps taken (number of tool calls made)
- Maximum value reached in the sequence
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: nerdai
- Source: nerdai/llm-agents-from-scratch
- License: Apache-2.0
- Homepage: https://masfromscratch.com/
Install and usage instructions live in the source repository linked above.
Reviews
No reviews yet, be the first.
Write a review
Versions
- v0.1.0 Imported from the upstream source.