passepartout: v0.6.0 — Time Awareness
Level 2: symbolic-time-memory skill - memory-objects-since(timestamp) — hash-table walk, objects with version >= timestamp - memory-objects-in-range(since until) — version between two timestamps - context-query-with-time — extended query with :since :until - 6 tests, 100% pass Level 3: sensor-time skill - format-time-for-llm — TIME: section for system prompt (iso/natural format) - session-duration — session start tracking - sensor-time-tick — deadline scanning, cron-registered, 0 LLM tokens - TIME_AWARENESS / TIME_FORMAT / DEADLINE_WARNING_MINUTES env vars - 13 tests, 100% pass Level 1: TIME injection in think() (core-reason) - fboundp-guarded call to format-time-for-llm - session duration included when sensor-time skill loaded - Injected at top of system prompt in both token-economics and fallback paths Full suite: 135/135 (100%)
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org/symbolic-time-memory.org
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#+TITLE: Symbolic Time Memory — temporal memory queries
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#+AUTHOR: Agent
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#+FILETAGS: :skill:time:memory:v0.6.0:
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#+PROPERTY: header-args:lisp :tangle ../lisp/symbolic-time-memory.lisp
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* Architectural Intent
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Every ~memory-object~ carries a ~version~ timestamp (~get-universal-time~) set on
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ingest since v0.1.0. But ~context-query~ in ~symbolic-awareness~ has no time
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filter — "what did I work on today?" serializes all nodes to the LLM instead
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of filtering 500→12 in sub-millisecond Lisp.
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This skill adds temporal query primitives and extends ~context-query~ with
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~:since~ / ~:until~ keyword parameters. Pure Lisp, sub-millisecond, 0 LLM
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tokens. ~90% token reduction on time-scoped memory queries.
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** Contract
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1. (memory-objects-since timestamp): walks ~*memory-store*~ returning objects
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with ~version >= timestamp~.
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2. (memory-objects-in-range since until): returns objects with version between
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~since~ and ~until~ (inclusive).
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3. (context-query-with-time &key max-results type filter since until): extends
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~context-query~ with temporal filtering. Falls back to ~context-query~ for
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non-time-scoped queries.
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* Implementation
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** Package context
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#+begin_src lisp
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(in-package :passepartout)
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#+end_src
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** Contract 1: memory-objects-since
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#+begin_src lisp
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(defun memory-objects-since (timestamp)
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"Returns all memory-objects from *memory-store* with version >= TIMESTAMP."
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(let ((results nil))
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(maphash (lambda (id obj)
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(declare (ignore id))
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(when (>= (memory-object-version obj) timestamp)
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(push obj results)))
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*memory-store*)
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(nreverse results)))
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#+end_src
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** Contract 2: memory-objects-in-range
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#+begin_src lisp
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(defun memory-objects-in-range (since until)
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"Returns memory-objects with version between SINCE and UNTIL (inclusive)."
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(let ((results nil))
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(maphash (lambda (id obj)
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(declare (ignore id))
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(let ((v (memory-object-version obj)))
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(when (and (>= v since) (<= v until))
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(push obj results))))
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*memory-store*)
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(nreverse results)))
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#+end_src
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** Context query extension
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#+begin_src lisp
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(defun context-query-with-time (&key (max-results 20) type-filter todo-filter since until)
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"Extended context query with temporal filtering.
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When :since and/or :until are provided, filters results by memory-object version.
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Falls back to context-query if temporal filtering is not requested."
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(let* ((all (if (fboundp 'memory-objects-by-attribute)
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(if type-filter
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(memory-objects-by-attribute :TYPE type-filter)
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(let ((results nil))
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(maphash (lambda (id obj)
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(declare (ignore id))
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(push obj results))
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*memory-store*)
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results))
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(let ((results nil))
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(maphash (lambda (id obj)
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(declare (ignore id))
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(push obj results))
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*memory-store*)
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results)))
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(time-filtered (cond
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((and since until)
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(remove-if (lambda (obj)
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(let ((v (memory-object-version obj)))
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(not (and (>= v since) (<= v until)))))
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all))
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(since
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(remove-if (lambda (obj)
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(< (memory-object-version obj) since))
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all))
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(until
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(remove-if (lambda (obj)
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(> (memory-object-version obj) until))
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all))
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(t all))))
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(let ((todo-filtered (if todo-filter
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(remove-if-not (lambda (obj)
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(string-equal (getf (memory-object-attributes obj) :TODO-STATE "") todo-filter))
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time-filtered)
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time-filtered)))
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(subseq todo-filtered 0 (min max-results (length todo-filtered))))))
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#+end_src
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* Test Suite
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#+begin_src lisp
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(eval-when (:compile-toplevel :load-toplevel :execute)
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(ql:quickload :fiveam :silent t))
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(defpackage :passepartout-time-memory-tests
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(:use :cl :fiveam :passepartout)
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(:export #:time-memory-suite))
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(in-package :passepartout-time-memory-tests)
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(def-suite time-memory-suite :description "Temporal memory filtering")
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(in-suite time-memory-suite)
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(test test-memory-objects-since
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"Contract 1: ingest at T0 and T1, verify memory-objects-since(T1) returns only T1 nodes."
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(clrhash passepartout::*memory-store*)
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(let ((t0 (get-universal-time)))
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(sleep 1)
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(ingest-ast (list :type :HEADLINE :properties (list :ID "time-a" :TITLE "A") :contents nil))
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(ingest-ast (list :type :HEADLINE :properties (list :ID "time-b" :TITLE "B") :contents nil))
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(sleep 1)
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(let ((t1 (get-universal-time)))
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(sleep 1)
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(ingest-ast (list :type :HEADLINE :properties (list :ID "time-c" :TITLE "C") :contents nil))
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(ingest-ast (list :type :HEADLINE :properties (list :ID "time-d" :TITLE "D") :contents nil))
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(let ((since-t1 (passepartout::memory-objects-since t1)))
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(is (= 2 (length since-t1)))
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(let ((ids (sort (mapcar #'memory-object-id since-t1) #'string<)))
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(is (string= "time-c" (first ids)))
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(is (string= "time-d" (second ids))))
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(let ((since-t0 (passepartout::memory-objects-since t0)))
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(is (= 4 (length since-t0))))))))
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(test test-memory-objects-in-range
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"Contract 2: ingest nodes, verify range query returns correct subset."
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(clrhash passepartout::*memory-store*)
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(let ((t0 (get-universal-time)))
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(sleep 1)
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(ingest-ast (list :type :HEADLINE :properties (list :ID "rng-1" :TITLE "One") :contents nil))
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(sleep 1)
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(let ((t1 (get-universal-time)))
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(sleep 1)
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(ingest-ast (list :type :HEADLINE :properties (list :ID "rng-2" :TITLE "Two") :contents nil))
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(sleep 1)
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(let ((t2 (get-universal-time)))
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(sleep 1)
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(ingest-ast (list :type :HEADLINE :properties (list :ID "rng-3" :TITLE "Three") :contents nil))
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(let ((range (passepartout::memory-objects-in-range t1 t2)))
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(is (= 1 (length range)))
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(is (string= "rng-2" (memory-object-id (first range)))))))))
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#+end_src
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