aster-chat-sessions

aster-chat-sessions is a skill for Claude Code, Codex from Zfinix/aster. It costs 0 tokens per session (557 once invoked), scanned A, original, Apache-2.0.

A guide to controlling aster, an AI coding agent, from commands and scripts. It covers one-off questions, conversation history, saved sessions, memory, and permission-controlled edits.

In plain words
What is it for?
Use it to script repository questions, continue earlier conversations, supply your own message history, inspect sessions and memory, or allow an agent to edit files.
Why use it?
It removes the need to manage terminal interaction and conversation state manually when embedding aster in tools or automation.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to script repository questions, continue earlier conversations, supply your own message history, inspect sessions and memory, or allow an agent to edit files.

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Install with agentmods
npx agentmods add skills/zfinix/aster/aster-chat-sessions
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Zfinix/aster --skill aster-chat-sessions
Clone the repo
git clone --depth 1 https://github.com/Zfinix/aster

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for aster-chat-sessions

README.md
[![agentmods](https://agentmods.dev/badge/skills/zfinix/aster/aster-chat-sessions/github.svg)](https://agentmods.dev/skills/zfinix/aster/aster-chat-sessions)
Your own site
<a href="https://agentmods.dev/skills/zfinix/aster/aster-chat-sessions"><img src="https://agentmods.dev/badge/skills/zfinix/aster/aster-chat-sessions/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for aster-chat-sessions

Your own site · 80×15
<a href="https://agentmods.dev/skills/zfinix/aster/aster-chat-sessions"><img src="https://agentmods.dev/badge/skills/zfinix/aster/aster-chat-sessions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 557 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00557
Opus 5.5 $0.00000 $0.00223
Sonnet 5.5 $0.00000 $0.00111
Haiku 4.5 $0.00000 $0.00056

Measured 1mo ago against content hash d7798dccb616, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

aster-chat-sessions scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/aster-chat-sessions/SKILL.md · 52 lines

What it actually says

Chat, sessions, and memory

aster chat talks to the review agent with read/search tools over the repo. In a terminal it opens a TUI; from scripts and agents always use the one-shot forms.

One-shot answers

aster chat -p "why is finding 2 critical?"       # plain text (default when piped)
aster chat --json "summarize the last review"    # {"reply", "edits", "usage"}
aster chat --no-tools -p "explain this error"    # plain LLM turn, no repo tools

--model overrides the model for the turn (else ASTER_MODEL, else aster.yaml).

History and persistence

aster chat --continue -p "and the second one?"   # seed the most recent session's history
aster chat --session <ID> -p "..."               # persist this turn into a session by id
aster chat --messages-json msgs.json -p "..."    # caller-owned history (or `-` for stdin)

--messages-json takes a JSON array of {"role","content"} with roles user | assistant | system. Combined with --session, the session only records the turn (the caller owns history); --session alone also seeds the session's prior history.

Edits

--allow-edits exposes an edit_file tool to the agent, gated by the permissions block in aster.yaml (deny-first globs, protected paths). Leave it off unless the task is explicitly to change files, and diff the working tree afterward.

Inspecting sessions

aster sessions                 # list saved sessions for this repo
aster sessions show <id>       # full transcript
aster sessions --json          # machine-readable (also on `show`)

Durable memory

aster memory                        # list stored memory
aster memory add "we use pnpm"      # append a fact to project memory
aster memory add --title deploy "…" # save a titled block
aster memory --json                 # machine-readable

Memory is per-repo and fed to future chats and reviews; store durable facts (conventions, constraints), not one-off context.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 52 lines · 0 tokens per session scan A d7798dccb616

Subscribe to this mod's changes

aster-chat-sessions is a skill published in the GitHub repository Zfinix/aster (133 stars, last pushed 2d ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 557 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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