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session-deep-dive

session-deep-dive is a skill for Claude Code from oliver-kriska/claude-elixir-phoenix. It costs 40 tokens per session (1,688 once invoked), scanned A, original, MIT.

A second-stage tool for detailed qualitative review of selected coding-agent sessions. It expects sessions to have been identified by a separate session scan and uses additional agents to compare patterns and findings.

In plain words
What is it for?
Use it to analyse one session, the latest eligible session, or all eligible sessions from the last scan, optionally comparing the results with an earlier report.
Why use it?
It turns scan results into a closer examination of what happened in high-signal sessions, without reviewing every session equally deeply.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter. Also seen: mentions subagents.

not rated 541repo +2 3d ago A scan SkillSpector: pass 40 tokens original MIT

Good fit Use it to analyse one session, the latest eligible session, or all eligible sessions from the last scan, optionally comparing the results with an earlier report.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/oliver-kriska/claude-elixir-phoenix/session-deep-dive
View source ↗ oliver-kriska/claude-elixir-phoenix phxagents.dev
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 oliver-kriska/claude-elixir-phoenix --skill session-deep-dive
Clone the repo
git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix

Made for: Claude Code.

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 session-deep-dive

README.md
[![agentmods](https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/session-deep-dive.svg)](https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/session-deep-dive)
Your own site
<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/session-deep-dive"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/session-deep-dive.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,688 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 $0.00040 $0.01688
Opus 5 $0.00020 $0.00844
Sonnet 5 $0.00008 $0.00338
Haiku 4.5 $0.00004 $0.00169

Measured 9d ago against content hash ce2233725419, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

session-deep-dive 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 9d 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.

.claude/skills/session-deep-dive/SKILL.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Session Deep Dive (Tier 2)

Qualitative analysis of high-signal sessions identified by /session-scan. Spawns subagents with pre-computed metrics context for focused analysis.

Requirements

Requires ccrider MCP. If not available:

ccrider MCP is required. See: https://github.com/neilberkman/ccrider

Usage

/session-deep-dive ffa155ee-ed8a-492c-8797-878fcbec4d9e
/session-deep-dive --last                    # Most recent Tier 2 eligible
/session-deep-dive --from-scan               # All Tier 2 eligible from last scan
/session-deep-dive --from-scan --compare .claude/UPDATED_PLUGIN_REPORT_160_SESSIONS.md

Pipeline

Step 1: Resolve Target Sessions

From $ARGUMENTS:

  • Session ID: Single session to analyze
  • --last: Most recent Tier 2 eligible session from metrics.jsonl
  • --from-scan: All sessions where tier2_eligible: true AND tier2_completed: false in .claude/session-metrics/metrics.jsonl
  • --compare REPORT.md: Previous report to compare against (default: most recent .claude/session-analysis/insights-*.md)

If no metrics.jsonl exists, tell the user:

No metrics found. Run /session-scan first to discover and score sessions.

Step 2: Load Pre-computed Metrics

For each target session, read its entry from metrics.jsonl. Format the metrics as a context block for subagent prompts:

## Pre-computed Metrics (from /session-scan)

- Friction: 0.42 (retry_loops: 1, user_corrections: 3, approach_changes: 2)
- Fingerprint: bug-fix (confidence: 0.85)
- Plugin opportunity: 0.65 (could use: investigate, quick)
- Tool profile: Read 28.7%, Edit 15.2%, Bash 19.3%, Tidewave 22.8%
- Duration: 78 minutes, 19 user messages, 171 tool calls

Determine PROJECT_ROOT from current working directory.

Step 3: Fetch Transcripts — One Subagent Per Session

CRITICAL: One ccrider call = one subagent. Full transcripts are 5-30KB each. Even 3 per worker floods the worker's context.

For EACH session, spawn a haiku subagent:

Read the full file on GitHub · 199 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 199 lines · 40 tokens per session scan A ce2233725419

Subscribe to this mod's changes

session-deep-dive is a skill published in the GitHub repository oliver-kriska/claude-elixir-phoenix (541 stars, last pushed 3d ago), licensed MIT. It adds 40 tokens to every session and 1,688 once invoked, about $0.0002 per session on Opus 5. 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.

Analytics and metricsClaude Codeautomationclaudeclaude-code-pluginclaude-code-skillsclaude-skills
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