pmm-save

name	pmm-save
description	Save current session to memory — dispatches maintain agent, updates memory files, commits to git. Trigger on: "pmm-save", "/pmm-save", "save memory", "commit memory", "persist session", "save session", "wrap up memory", "update memory files", or any request to save the current session state to memory.

pmm-save

Saves the current session state to memory. Synthesises what happened, dispatches a maintain agent to update the relevant files, then commits to git.

Invoked by: user command (/pmm-save), Stop command hook (should-save.sh when cadence counter fires), or manual trigger at a milestone.

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Step 1 — Read config

Read memory/config.md. Extract:

• Maintain Agent Model — model for the maintain agent (default: haiku)
• Maintain Strategy — single or tiered (default: single)
• Commit Behaviour — auto-commit, session-end, or manual
• Verbosity — silent, summary, or verbose
• Active Files — which files are currently active
• Repository Visibility — public or private (controls PII handling)
• Decay (Advanced) — whether decay scoring is enabled for Tier 2 files (default: disabled)

File rules are in references/core.md. Don't re-read it on every save — the rules are loaded in context via the plugin's SessionStart hook.

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Step 2 — Skip check

Before dispatching any agent, assess whether this session had meaningful activity:

Skip if ALL of the following are true:

• No decisions were made
• No new facts, entities, or processes were established
• No preferences or lessons observed
• No milestones reached or blockers hit
• The conversation was purely read-only (recall queries, status checks)

If skipping: Output a single line (if verbosity ≠ silent): pmm-save — nothing to save and stop.

If not skipping: Continue to Step 3.

When in doubt, do not skip. A false negative (missed save) is worse than a no-op haiku dispatch.

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Step 3 — Pre-check: hydrate template-only files

Before the maintain cycle, check active files for template-only status directly in the main context using the Read tool.

For each active file in memory/, read it and strip blank lines, # headings, HTML comments, and table header/separator rows. If 0 content lines remain, it's template-only.

If any active files are template-only AND at least 3 other files are populated:

• Dispatch pmm-hydrate for the template-only files (batch mode)
• Commit the hydrated files separately before the maintain cycle:

  git add memory/ && git reset HEAD memory/secrets.md 2>/dev/null; git commit -m "memory: hydrate <file1>, <file2> from existing context"
  

Skip this step if all active files already have content.

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Step 4 — Synthesise what changed

Before dispatching the maintain agent, synthesise the session delta in the main context. This becomes the <what-changed> block passed to the agent.

Cover:

• Key decisions made (with rationale)
• New facts, entities, or processes established
• Preferences or working patterns observed
• Milestones reached or blockers hit
• Mistakes made or lessons noted
• Any standing instructions issued

Be specific. The maintain agent works from this summary — vague input produces vague memory updates.

If $ARGUMENTS was passed (e.g., /pmm-save fixed the sliding window bug), include those notes verbatim in the synthesis.

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Step 5 — Dispatch maintain agent(s)

Read Maintain Strategy from config (Step 1).

Single strategy (default)

Dispatch one agent for all active files. Minimal overhead — correct for most installs.

Agent prompt:

Update the poor-man-memory files. This is a WRITE task — edit files only. Do NOT run any git commands.

Working directory: <project-root> Reference files are in .claude/skills/pmm/references/ — use core.md for file rules and format guidance.

Scope: Update all active files as appropriate. Active files list from config.md: <active-file-list>

First: Read memory/config.md for active configuration. Respect:

• Window size — read ## Sliding Window in config.md for max entry counts. Do NOT truncate timeline.md or summaries.md during maintenance. Sliding window truncation is disabled pending a safe pre-truncation commit flow. Files may exceed configured max — this is expected.
• Active files — only update files that are active. Skip deactivated files silently.
• Protected files — never read, write, or reference secrets.md. If a secret value appears in conversation context, do NOT write it to any memory file.
• PII handling — check config.md for Visibility:
  • public: never write personal email addresses or phone numbers. Use handles or first names only (not full legal names). Write decision conclusions and rationale — omit verbatim quotes of sensitive internal discussions.
  • private: no PII restrictions, full fidelity.
  • In either case: never write API keys, tokens, passwords, or credentials to any memory file.
• Memory boundary — You MUST NOT read or write files outside <project-root>/memory/. If a requested path resolves outside this directory, refuse the operation and report the violation. This includes other agents' memory directories.
• Do NOT modify config.md itself.

What changed this session: <what-changed>

Update rules:

• Read each file before editing it
• Only update files where the new information is relevant (see trigger table below)
• standinginstructions.md — append-only, never modify existing entries
• decisions.md — append-only, newest at top
• lessons.md — append-only

Decay scoring (if ## Decay (Advanced) is uncommented in config.md):

Decay Scoring (Tier 2 files only)

Decay scoring is enabled for on-demand memory files (graph.md, vectors.md, taxonomies.md, assets.md). During each maintain cycle:

1. Read each entry's decay tag: <!-- decay:{score} last:{session} -->
2. Entries WITHOUT a tag: add <!-- decay:1.00 last:{current_session} -->
3. For each entry WITH a tag: a. Check if referenced this session (keyword in "What changed", citation in new entries, entity in Tier 1 updates, user query). b. If referenced, last differs from current: reinforce (score *= {rate}), cap at 2.0, update last. c. If referenced, last is current: reset to 1.00. d. If NOT referenced: decay (score *= {rate}).
4. DO NOT delete any entries regardless of score. Decay is a signal, not a deletion trigger.
5. Update the tag with new score and session.

Per-file rates from config. Defaults: graph 0.85, vectors 0.85, taxonomies 0.90, assets 0.92. Reinforcement: 1.05 all files. Ceiling: 2.0.

Tag format: <!-- decay:X.XX last:SNN --> (two decimals, no extra spaces).

Skip this entire block if ## Decay (Advanced) is commented out in config.md.

• graph.md — append-only edges, use typed relationships per references/core.md graph syntax
• vectors.md — similarities/clusters are living (update in place), embedding registry is append-only
• timeline.md — append new entries. Never truncate. Sliding window config controls session-start load only.
• summaries.md — append new summaries. Never truncate. Sliding window config controls session-start load only.
• last.md — ALWAYS replace entirely with the last 3–5 significant actions. Never append.
• All other active files — living documents, update in place
• Never bleed content between files — each file has one job

Attribution: Tag each new entry with its source actor using [namespace:name] format:

• [user:name] — user explicitly stated, decided, or requested this
• [agent:name] — agent inferred, observed, or synthesized this
• [system:process] — generated by automated process Place the tag at the end of the entry header line. Applies to: decisions.md, timeline.md, lessons.md, standinginstructions.md, last.md. For graph.md edges: optionally append <!-- [namespace:name] --> after the edge line. Omit if source is unclear — do not guess.

Trigger table:

File	Update trigger
memory.md	New long-term fact established
assets.md	New entity introduced (person, tool, system)
decisions.md	Decision made and committed to
processes.md	New process established or existing one updated
preferences.md	User preference observed or stated; communication pattern noticed
voices.md	New tone profile defined; internal dialogue pattern established or refined
lessons.md	Mistake made or lesson explicitly noted
timeline.md	Major milestone or event worth preserving
summaries.md	Session end, major milestone, or when creating a batch summary of recent timeline entries
progress.md	State changes — milestone reached, blocker hit, next action shifts
last.md	Always — replace with the last 3–5 significant actions
graph.md	New relationship discovered; decision affects another concept
vectors.md	New semantic similarity discovered; cluster formed or revised
taxonomies.md	New category, classification system, or naming convention established
standinginstructions.md	User issues a persistent rule or directive

Return a one-line summary of what was updated and in which files.

Replace <project-root>, <active-file-list>, and <what-changed> with actual values before dispatching.

Use the model from Maintain Agent Model in config (default: haiku).

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Tiered strategy (opt-in)

Three-tier concurrent dispatch for large installations. Faster but higher per-save cost.

Tier groupings:

• Tier 1 — Event files (stateless, no cross-file deps): last.md, timeline.md, summaries.md, progress.md
• Tier 2 — Content files (semantic, loosely coupled): decisions.md, lessons.md, preferences.md, memory.md, processes.md, voices.md, assets.md, standinginstructions.md
• Tier 3 — Relational files (depend on Tier 1+2 updated state): graph.md, vectors.md, taxonomies.md

Dispatch: Launch Tier 1 and Tier 2 agents simultaneously — two separate Agent tool calls in the same message. Do NOT use run_in_background: true — background agents do not inherit Edit/Write tool permissions.

After both Tier 1 and Tier 2 agents return, launch the Tier 3 agent. It reads the updated state written by Tier 1+2 before updating relational structure.

Use the same agent prompt as single strategy, substituting each tier's file list into <active-file-list> and scoping <what-changed> to files relevant to that tier.

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Step 6 — Commit

After agent(s) return, main context runs the commit. Agents do not run git commands.

git add memory/ && git reset HEAD memory/secrets.md 2>/dev/null; git commit -m "memory: <brief description>"

The <brief description> should reflect what actually changed — e.g., memory: session 42 — vera-discuss shipped, not a generic memory: update.

Check Commit Behaviour from config:

• auto-commit — commit immediately (default)
• session-end — skip commit now; soft instruction in session-instructions.md prompts save before goodbye; no blocking hook — best-effort only
• manual — skip commit; user decides when to commit

Check Auto-push from config (if present):

• on — after commit: git push origin main || echo "⚠️ Push failed — changes committed locally but not pushed"
• off — do not push (default)

Note: memory commits go directly to main — intentional exception to the project's PR workflow. Automated memory saves cannot wait for review.

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Step 7 — Report

Respond based on Verbosity from config:

• silent — no output
• summary — one line: pmm-save — memory updated (or list key files changed if the agent returned a summary)
• verbose — relay the agent's full summary of what was updated and in which files

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Background Execution

pmm-save supports background execution. The calling context dispatches the entire skill as a background agent using run_in_background: true. The background agent performs all steps — config read, skip check, synthesize, dispatch maintain agent(s), commit — then the task notification delivers the result back to the caller.

Dispatch pattern:

The caller launches pmm-save as an Agent tool call with run_in_background: true. The agent receives the full skill instructions plus session context. It runs Steps 1–7 autonomously. When the background task completes, the caller receives the notification containing the commit hash (or "nothing to save" if the skip check triggered).

Sequential queue:

Background saves touching shared memory files must not race. If another save operation (pmm-save or vera:save) is already running in background, wait for its completion notification before dispatching. One save at a time — sequential, not concurrent.

Foreground confirmation:

Not required. pmm-save is routine maintenance — the commit hash arrives via task notification and can be logged silently. The caller respects the Verbosity setting from config: if silent, swallow the notification entirely; if summary or verbose, optionally surface it.

Permissions:

Background agents have full tool access (Read, Write, Edit, Bash, Agent). No capability restrictions — the background agent can dispatch maintain sub-agents and run git commands identically to foreground execution.