Module: PWN::Memory

Defined in:
lib/pwn/memory.rb

Overview

PWN::Memory provides persistent cross-session memory for the pwn-ai agent. Facts, user preferences, environment details, lessons learned, and task state are stored in ~/.pwn/memory.json and survive across REPL restarts / pwn-ai sessions.

The pwn-ai agent (in agent mode) automatically receives relevant memory injected into its system prompt. The agent can also call remember/recall via ruby code blocks during execution loops.

Constant Summary collapse

MEMORY_FILE = 
File.join(Dir.home, '.pwn', 'memory.json')
VALUE_MAX_CHARS =

Lean retention — keep RL-quality signal, drop ephemeral bulk.

2_000
PROTECT_KEY_PREFIXES = 
%w[operator_pref_ process_sop_ mistake_fix_ memory_].freeze
PROTECT_CATEGORIES = 
%i[preference].freeze
EPHEMERAL_KEY_PREFIXES = 
%w[session_].freeze
EPHEMERAL_TTL_SECS = 
7 * 86_400
META_RECALL_USER_RX =

Meta prior-turn recall asks (not substantive conversational content). Used so nested "what did you say when I said that?" skips the intermediate recall Q/A and lands on the real user↔assistant pair.

/
  \A\s*(?:and\s+)?(?:
    what\s+did\s+i\s+|
    what\s+was\s+my\s+last|
    how\s+did\s+you\s+respond|
    how\s+did\s+you\s+(?:just\s+)?(?:answer|reply)|
    what\s+(?:was|is)\s+your\s+(?:last|previous|prior)\s+|
    what\s+did\s+you\s+(?:just\s+)?(?:say|answer|reply|respond)|
    remind\s+me\s+what\s+|
    repeat\s+(?:my\s+|your\s+)?(?:last|previous)|
    last\s+thing\s+i\s+said|
    say\s+that\s+again
  )
/ix
META_RECALL_ASST_RX = 
/
  \A\s*(?:
    You\s+just\s+said:|
    Immediately\s+prior\s+(?:user\s+message|assistant\s+response):|
    I\s+do\s+not\s+have\s+a\s+prior\s+assistant\s+reply
  )
/ix

Class Method Summary collapse

Class Method Details

.authors ⇒ Object

Author(s)

0day Inc. support@0dayinc.com



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# File 'lib/pwn/memory.rb', line 597

public_class_method def self.authors
  "AUTHOR(S):\n  0day Inc. <support@0dayinc.com>\n"
end

.clear(opts = {}) ⇒ Object

Supported Method Parameters

PWN::Memory.clear(force: true)

Requires force:true — protected prefs/SOPs must not vanish via bare clear.



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# File 'lib/pwn/memory.rb', line 496

public_class_method def self.clear(opts = {})
  force = if opts.is_a?(Hash)
            opts[:force] ? true : false
          else
            false
          end
  raise 'ERROR: refusing Memory.clear without force:true (would drop PROTECT_KEY_PREFIXES/PROTECT_CATEGORIES)' unless force

  FileUtils.rm_f(MEMORY_FILE)
  save(mem: {}, force: true) # recreate empty file atomically
  {}
end

.current_session_id(opts = {}) ⇒ Object

Resolve the active pwn-ai session id (Env, then Pry config).



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# File 'lib/pwn/memory.rb', line 189

public_class_method def self.current_session_id(opts = {})
  sid = opts[:session_id].to_s
  return sid unless sid.empty?

  if defined?(PWN::Env) && PWN::Env.is_a?(Hash)
    sid = PWN::Env.dig(:ai, :session_id).to_s
    return sid unless sid.empty?
  end

  return Pry.config.pwn_ai_session_id.to_s if defined?(Pry) && Pry.respond_to?(:config) && Pry.config.respond_to?(:pwn_ai_session_id)

  ''
end

.find_turn_pair(opts = {}) ⇒ Object

Find a user↔assistant pair in the active session. match: optional substring / quoted utterance to locate the user turn skip_meta: skip pure-recall intermediate pairs (default true) Returns the newest matching pair hash, or nil.



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# File 'lib/pwn/memory.rb', line 408

public_class_method def self.find_turn_pair(opts = {})
  match = opts[:match].to_s.strip
  skip_meta = opts.key?(:skip_meta) ? opts[:skip_meta] : true
  pairs = turn_pairs(
    session_id: opts[:session_id],
    pairs: opts[:pairs] || 12,
    max_chars: opts[:max_chars] || 4_000
  )
  return nil if pairs.empty?

  candidates = pairs
  if skip_meta
    candidates = pairs.reject do |p|
      meta_recall_user?(p[:user_content]) || meta_recall_assistant?(p[:assistant_content])
    end
    candidates = pairs if candidates.empty?
  end

  return candidates.last if match.empty?

  needle = normalize_utterance(match)
  return nil if needle.empty?

  # Prefer exact normalized equality, then include, newest first.
  exact = candidates.reverse.find { |p| normalize_utterance(p[:user_content]) == needle }
  return exact if exact

  candidates.reverse.find do |p|
    body = normalize_utterance(p[:user_content])
    body.include?(needle) || needle.include?(body)
  end
rescue StandardError
  nil
end

.forget(opts = {}) ⇒ Object

rubocop:disable Naming/PredicateMethod



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# File 'lib/pwn/memory.rb', line 478

public_class_method def self.forget(opts = {}) # rubocop:disable Naming/PredicateMethod
  key = opts[:key]
  raise 'ERROR: key is required' if key.nil?

  force = opts[:force] ? true : false
  mem = load
  entry = mem[key.to_sym]
  raise "ERROR: refusing to forget protected memory key #{key.inspect} (matches PROTECT_KEY_PREFIXES/PROTECT_CATEGORIES; pass force:true)" if entry && protected_entry?(key: key, entry: entry) && !force

  mem.delete(key.to_sym)
  # Last-key delete legitimately yields {}; force so empty-guard does not revive it.
  save(mem: mem, force: mem.empty?)
  true
end

.help ⇒ Object

Display Usage for this Module



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# File 'lib/pwn/memory.rb', line 602

public_class_method def self.help
  puts <<~USAGE
    USAGE:
      mem = PWN::Memory.load
      PWN::Memory.remember(key: :user_prefers_ruby, value: 'Always prefer pure Ruby + RestClient patterns', category: :preference)
      facts = PWN::Memory.recall(query: 'recon', category: :fact, limit: 10)
      # session-first (previous response → older), then durable newest-first:
      sess  = PWN::Memory.recall(limit: 10)  # or session_id: '20260811_...'
      hits  = PWN::Memory.recall_semantic(query: 'recon', limit: 6)  # embedding-ranked
      PWN::Memory.forget(key: :some_key)
      PWN::Memory.forget(key: :operator_pref_x) rescue puts('protected')
      PWN::Memory.clear(force: true)
      context_str = PWN::Memory.to_context
      PWN::Memory.lean!(dry_run: true)  # drop expired session_* + truncate values

      #{self}.authors
  USAGE
end

.lean!(opts = {}) ⇒ Object

Supported Method Parameters

result = PWN::Memory.lean!( dry_run: 'optional - Boolean plan only (default false)', value_max_chars: 'optional - truncate values (default VALUE_MAX_CHARS)', ephemeral_ttl_secs: 'optional - drop expired session_* keys' )

Compact overlong values and drop expired ephemeral session_* keys. Never removes protected prefs/SOPs/fix lessons. Safe with empty-save guard.



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# File 'lib/pwn/memory.rb', line 543

public_class_method def self.lean!(opts = {})
  dry = opts[:dry_run] ? true : false
  vmax = (opts[:value_max_chars] || VALUE_MAX_CHARS).to_i
  ttl_secs = (opts[:ephemeral_ttl_secs] || EPHEMERAL_TTL_SECS).to_i
  mem = load
  before_bytes = File.exist?(MEMORY_FILE) ? File.size(MEMORY_FILE) : 0
  removed = []
  truncated = []
  now = Time.now.utc

  mem.each do |k, v|
    key = k.to_s
    next if protected_entry?(key: key, entry: v)

    if EPHEMERAL_KEY_PREFIXES.any? { |p| key.start_with?(p) }
      age = begin
        now - Time.parse(v[:timestamp].to_s)
      rescue StandardError
        ttl_secs + 1
      end
      exp = v[:ttl].to_i.positive? ? v[:ttl].to_i : ttl_secs
      if age > exp
        removed << key
        next
      end
    end

    next unless v[:value].is_a?(String) && v[:value].to_s.bytesize > vmax

    truncated << key
    v[:value] = "#{v[:value].to_s[0, vmax]}…[compacted]" unless dry
  end

  removed.each { |k| mem.delete(k.to_sym) } unless dry
  save(mem: mem, force: mem.empty?) unless dry || (removed.empty? && truncated.empty?)

  {
    removed: removed.length,
    truncated: truncated.length,
    remaining: mem.size,
    removed_keys: removed.first(20),
    truncated_keys: truncated.first(20),
    bytes_before: before_bytes,
    bytes_after: if dry
                   before_bytes
                 else
                   (File.exist?(MEMORY_FILE) ? File.size(MEMORY_FILE) : 0)
                 end,
    dry_run: dry
  }
end

.load ⇒ Object

Supported Method Parameters

memory = PWN::Memory.load



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# File 'lib/pwn/memory.rb', line 27

public_class_method def self.load
  FileUtils.mkdir_p(File.dirname(MEMORY_FILE))
  return {} unless File.exist?(MEMORY_FILE)

  raw = File.read(MEMORY_FILE)
  return {} if raw.strip.empty? || raw.strip == '{}'

  JSON.parse(raw, symbolize_names: true)
rescue JSON::ParserError, EncodingError => e
  # Never silently return {} for a non-trivial file — that turns the next
  # consolidate/save into a full wipe. Quarantine + empty is safer only
  # when the caller opted in; default is keep last good and warn.
  warn "[pwn-ai/memory] load parse failed (#{e.class}: #{e.message}); refusing empty fallback for #{File.size(MEMORY_FILE)}B file"
  raise
rescue StandardError => e
  warn "[pwn-ai/memory] load failed: #{e.class}: #{e.message}"
  raise
end

.meta_recall_assistant?(opts = {}) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pwn/memory.rb', line 448

public_class_method def self.meta_recall_assistant?(opts = {})
  text = opts.is_a?(Hash) ? opts[:text] : opts
  text.to_s.match?(META_RECALL_ASST_RX)
end

.meta_recall_user?(opts = {}) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pwn/memory.rb', line 443

public_class_method def self.meta_recall_user?(opts = {})
  text = opts.is_a?(Hash) ? opts[:text] : opts
  text.to_s.match?(META_RECALL_USER_RX)
end

.normalize_utterance(opts = {}) ⇒ Object 



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# File 'lib/pwn/memory.rb', line 453

public_class_method def self.normalize_utterance(opts = {})
  text = opts.is_a?(Hash) ? opts[:text] : opts
  text.to_s.downcase.gsub(/[`"'“”‘’]/, '').gsub(/\s+/, ' ').strip
end

.prior_assistant_message(opts = {}) ⇒ Object

Previous non-empty assistant message in the active session. skip_meta:true walks past canned recall answers so the substantive reply stays findable after nested "what did you say when…" follow-ups.



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# File 'lib/pwn/memory.rb', line 350

public_class_method def self.prior_assistant_message(opts = {})
  pairs = (opts[:pairs] || 6).to_i
  max_chars = opts[:max_chars] || 4_000
  skip_meta = opts.key?(:skip_meta) ? opts[:skip_meta] : false
  dialog = recent_dialog(session_id: opts[:session_id], pairs: pairs, max_chars: max_chars)
  dialog.reverse.find do |t|
    next false unless t[:role].to_s == 'assistant'
    next false if skip_meta && meta_recall_assistant?(t[:content])

    true
  end
rescue StandardError
  nil
end

.prior_user_message(opts = {}) ⇒ Object

Previous non-empty user message in the active session (what the human "just said" before the current request). Nil when none. skip_meta:true walks past pure-recall intermediate asks.



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# File 'lib/pwn/memory.rb', line 332

public_class_method def self.prior_user_message(opts = {})
  pairs = (opts[:pairs] || 6).to_i
  max_chars = opts[:max_chars] || 4_000
  skip_meta = opts.key?(:skip_meta) ? opts[:skip_meta] : false
  dialog = recent_dialog(session_id: opts[:session_id], pairs: pairs, max_chars: max_chars)
  dialog.reverse.find do |t|
    next false unless t[:role].to_s == 'user'
    next false if skip_meta && meta_recall_user?(t[:content])

    true
  end
rescue StandardError
  nil
end

.protected_entry?(opts = {}) ⇒ Boolean

True when a memory key must survive cap eviction / age GC.

Returns:

  • (Boolean) 


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# File 'lib/pwn/memory.rb', line 525

public_class_method def self.protected_entry?(opts = {})
  key = opts[:key].to_s
  entry = opts[:entry] || {}
  return true if PROTECT_KEY_PREFIXES.any? { |p| key.start_with?(p) }
  return true if PROTECT_CATEGORIES.map(&:to_s).include?(entry[:category].to_s)

  false
end

.recall(opts = {}) ⇒ Object

Supported Method Parameters

results = PWN::Memory.recall( query: 'optional - string to search keys/values/categories (simple match)', category: 'optional - filter by category (:session = transcript only)', limit: 'optional - max results (default 50)', session_id: 'optional - current session (default Env/Pry active id)' )

Returns session turns first (previous assistant response -> older, current session only, empty/invalid skipped), then durable memory newest-first.



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# File 'lib/pwn/memory.rb', line 131

public_class_method def self.recall(opts = {})
  query = opts[:query].to_s.downcase
  category = opts[:category]
  limit = (opts[:limit] || 50).to_i
  limit = 50 if limit <= 0
  session_id = opts[:session_id]
  session_id = current_session_id if session_id.to_s.empty?
  # Default ON for memory_recall tool UX. to_context passes false so the
  # injected MEMORY block stays durable cross-session facts only.
  include_session = if opts.key?(:include_session)
                      opts[:include_session] ? true : false
                    else
                      true
                    end

  ordered = {}

  # 1) Current-session turns first: start at previous response, walk older.
  #    Skips empty/invalid turns. Stays scoped to this session only.
  if include_session && !(category && category.to_sym != :session)
    session_turns(session_id: session_id, query: query, limit: limit).each do |entry|
      break if ordered.length >= limit

      key = entry[:key]
      ordered[key] = entry.except(:key)
    end
  end

  # 2) Durable ~/.pwn/memory.json (newest timestamp first) fills remaining slots.
  if ordered.length < limit && !(category && category.to_sym == :session)
    mem = load
    durable = mem.select do |k, v|
      match = true
      if query && !query.empty?
        match &&= k.to_s.downcase.include?(query) ||
                  v[:value].to_s.downcase.include?(query) ||
                  v[:category].to_s.downcase.include?(query)
      end
      match &&= (v[:category].to_s == category.to_s) if category
      match
    end
    durable_sorted = durable.sort_by do |k, v|
      [-Time.parse(v[:timestamp].to_s).to_i, k.to_s]
    rescue StandardError
      [0, k.to_s]
    end
    durable_sorted.each do |k, v|
      break if ordered.length >= limit
      next if ordered.key?(k)

      ordered[k] = v
    end
  end

  ordered
end

.recall_semantic(opts = {}) ⇒ Object

Supported Method Parameters

hits = PWN::Memory.recall_semantic(query: 'nmap sweep', limit: 6)

Relevance-ranked recall via PWN::MemoryIndex (local Ollama embeddings

  • cosine over ~/.pwn/memory.idx). Falls back to substring .recall when no embedding backend is configured.


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# File 'lib/pwn/memory.rb', line 464

public_class_method def self.recall_semantic(opts = {})
  return recall(query: opts[:query], limit: opts[:limit]) unless defined?(PWN::MemoryIndex) && PWN::MemoryIndex.available?

  PWN::MemoryIndex.recall_semantic(query: opts[:query], limit: opts[:limit])
rescue StandardError
  recall(query: opts[:query], limit: opts[:limit])
end

.recent_dialog(opts = {}) ⇒ Object

Supported Method Parameters

dialog = PWN::Memory.recent_dialog( session_id: 'optional', pairs: 'optional - max user/assistant pairs (default 2)', max_chars: 'optional - per-turn truncation (default 1200)' )

Chronological user/assistant turns ending at the previous assistant response (current session only). Empty/invalid/tool noise skipped.



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# File 'lib/pwn/memory.rb', line 279

public_class_method def self.recent_dialog(opts = {})
  pairs = (opts[:pairs] || 2).to_i
  pairs = 2 if pairs <= 0
  max_chars = (opts[:max_chars] || 1_200).to_i
  max_chars = 1_200 if max_chars <= 0
  turns = session_turns(session_id: opts[:session_id], limit: pairs * 6)
  dialog = turns.select { |t| %w[user assistant].include?(t[:role].to_s) }
  # session_turns is previous-assistant-first (newest → older). Take the
  # newest 2*pairs dialog turns and flip to chronological for prompts.
  slice = dialog.first(pairs * 2).reverse
  slice.map do |t|
    body = t[:value].to_s
    body = "#{body[0, max_chars]}…[truncated]" if body.length > max_chars
    {
      role: t[:role].to_s,
      content: body,
      timestamp: t[:timestamp],
      session_id: t[:session_id]
    }
  end
rescue StandardError
  []
end

.remember(opts = {}) ⇒ Object

Supported Method Parameters

PWN::Memory.remember( key: 'required - Symbol or String key for the memory fact', value: 'required - The value (any JSON serializable)', category: 'optional - e.g. :fact, :preference, :lesson, :env (default: :fact)', source: 'optional - :human | :reflect | :heuristic | :resolve | :consolidate (M3 provenance)', confidence: 'optional - 0.0..1.0 how sure the writer was (M3)', importance: 'optional - 0.0..1.0 retrieval/eviction weight (M2/M3)', ttl: 'optional - seconds until stale (M3; consolidate evicts stale low-conf first)' )



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# File 'lib/pwn/memory.rb', line 94

public_class_method def self.remember(opts = {})
  key = opts[:key]
  value = opts[:value]
  category = opts[:category] || :fact

  raise 'ERROR: key and value are required' if key.nil? || value.nil?

  mem = load
  val = value.is_a?(String) ? value.to_s : value
  val = "#{val.to_s[0, VALUE_MAX_CHARS]}…[compacted]" if val.is_a?(String) && val.bytesize > VALUE_MAX_CHARS
  entry = {
    value: val,
    category: category.to_sym,
    timestamp: Time.now.utc.iso8601,
    # M3 — provenance & scoring so Learning.consolidate evicts by
    # (age/ttl)/(importance×confidence) instead of oldest-first, and
    # MemoryIndex.recall_semantic ranks by sim × recency × importance.
    source: (opts[:source] || 'pwn-ai').to_s,
    confidence: opts[:confidence]&.to_f&.clamp(0.0, 1.0),
    importance: opts[:importance]&.to_f&.clamp(0.0, 1.0),
    ttl: opts[:ttl]&.to_i
  }.compact
  mem[key.to_sym] = entry
  save(mem: mem)
  mem[key.to_sym]
end

.save(opts = {}) ⇒ Object

Supported Method Parameters

PWN::Memory.save(mem: memory_hash)



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# File 'lib/pwn/memory.rb', line 48

public_class_method def self.save(opts = {})
  mem = opts[:mem] ||= {}
  force = opts[:force] ? true : false
  FileUtils.mkdir_p(File.dirname(MEMORY_FILE))
  # 4.4 — flock + atomic rename (nightly practice × interactive)
  path = MEMORY_FILE
  # Guard: never clobber a non-empty memory.json with {} unless force.
  # Root cause of 2026-08-05 wipe: load-rescue→{} then consolidate/save.
  if !force && mem.respond_to?(:empty?) && mem.empty? && File.exist?(path) && File.size(path) > 4
    warn "[pwn-ai/memory] refusing empty overwrite of #{File.size(path)}B #{path} (pass force:true to clear)"
    return load_raw_or_empty(path: path)
  end
  tmp = File.join(File.dirname(path), ".#{File.basename(path)}.#{Process.pid}.tmp")
  body = JSON.pretty_generate(mem)
  File.open(tmp, File::WRONLY | File::CREAT | File::TRUNC, 0o644) do |f|
    f.flock(File::LOCK_EX)
    f.write(body)
    f.flush
    f.fsync
  end
  File.rename(tmp, path)
  mem
ensure
  FileUtils.rm_f(tmp) if defined?(tmp) && tmp && File.exist?(tmp)
end

.session_turns(opts = {}) ⇒ Object

Walk the current session transcript from the previous assistant response backward (previous -> older). Empty/invalid turns are skipped. Returns Array of hashes with :key plus entry fields (role/value/...).



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# File 'lib/pwn/memory.rb', line 206

public_class_method def self.session_turns(opts = {})
  sid = opts[:session_id].to_s
  sid = current_session_id if sid.empty?
  return [] if sid.empty?
  return [] unless defined?(PWN::Sessions)

  query = opts[:query].to_s.downcase
  limit = (opts[:limit] || 50).to_i
  limit = 50 if limit <= 0

  rows = PWN::Sessions.load(session_id: sid)
  return [] if rows.nil? || rows.empty?

  valid = []
  rows.each_with_index do |e, idx|
    next unless e.is_a?(Hash)

    role = e[:role].to_s
    content = e[:content].to_s
    next if content.strip.empty?
    next unless %w[assistant user tool system observation].include?(role)
    # Skip the bootstrap system line when it has no useful body.
    next if role == 'system' && content.match?(/\ASession started:/i)

    valid << {
      idx: idx,
      role: role,
      content: content,
      timestamp: e[:timestamp]
    }
  end
  return [] if valid.empty?

  # Previous response = most recent non-empty assistant turn in-session.
  last_asst = valid.rindex { |e| e[:role] == 'assistant' }
  # If no assistant yet, still walk backward from the latest valid turn.
  start_at = last_asst || (valid.length - 1)
  backward = valid[0..start_at].reverse

  hits = []
  backward.each do |e|
    break if hits.length >= limit

    content = e[:content]
    role = e[:role]
    if query && !query.empty? && !(content.downcase.include?(query) ||
                  role.include?(query) ||
                  "session_#{sid}".include?(query))
      next
    end

    hits << {
      key: :"session_turn_#{sid}_#{e[:idx]}",
      value: content,
      category: :session,
      role: role,
      timestamp: e[:timestamp],
      session_id: sid,
      source: 'session_backward'
    }
  end
  hits
end

.to_context(opts = {}) ⇒ Object

Supported Method Parameters

context = PWN::Memory.to_context(limit: 20) (used internally by pwn-ai hook to inject into system prompt)



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# File 'lib/pwn/memory.rb', line 512

public_class_method def self.to_context(opts = {})
  limit = opts[:limit] || 20
  mem = recall(limit: limit, include_session: false)
  return '' if mem.empty?

  ctx = "\n\nPERSISTENT MEMORY (cross-session facts, prefs, lessons - use PWN::Memory.remember to store new ones):\n"
  mem.each do |k, v|
    ctx += "- #{k} [#{v[:category]} @ #{v[:timestamp]}]: #{v[:value].to_s[0, 300]}\n"
  end
  ctx
end

.turn_pairs(opts = {}) ⇒ Object

Build chronological user→assistant pairs from the active session. Each pair is { user:, assistant:, user_content:, assistant_content: }. Solo user turns (no reply yet) are omitted unless include_orphan_user:true.



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# File 'lib/pwn/memory.rb', line 368

public_class_method def self.turn_pairs(opts = {})
  pairs_n = (opts[:pairs] || 8).to_i
  pairs_n = 8 if pairs_n <= 0
  max_chars = (opts[:max_chars] || 4_000).to_i
  dialog = recent_dialog(session_id: opts[:session_id], pairs: pairs_n, max_chars: max_chars)
  out = []
  i = 0
  while i < dialog.length
    t = dialog[i]
    if t[:role].to_s == 'user'
      nxt = dialog[i + 1]
      if nxt && nxt[:role].to_s == 'assistant'
        out << {
          user: t,
          assistant: nxt,
          user_content: t[:content].to_s,
          assistant_content: nxt[:content].to_s
        }
        i += 2
        next
      elsif opts[:include_orphan_user]
        out << {
          user: t,
          assistant: nil,
          user_content: t[:content].to_s,
          assistant_content: nil
        }
      end
    end
    i += 1
  end
  out
rescue StandardError
  []
end