Essence Extractor

Complete Definition = (Qualifying Conditions) Essence
Essence = Minimal, directional state change
The One = Minimal migratable structural formula of essence

(For passengers, in travel scenarios, on-demand, paid, safe, and comfortable) move people from point A to point B
                                                    ^^^^^^^^^^^^^^^^^^^^
                                                    Essence

Four Modules, Each with One Task

• Stripping: Use short bullet points with keywords to explain which content is moved to parentheses and why, instead of writing a crowded paragraph of "qualifications".
• Example: Let the reader enter a scenario as "you", personally complete operations, observe state changes, and then map the operations back to the core word by word.
• Structural Migration: First compress the same core with the weakest yet sufficient symbolic relationship, then map the object, starting point, end point, direction, and completion state item by item in a distant domain.
• Validation: Only retain the two conclusions of "replacement" and "deletion"; other checks are internal reasoning and do not add reading burden.

What to Record in "Issue"

ljg-is

Easy Misidentification: The qualifications, advantages, or implementations most easily mistaken as essence
Real Issue: Who or what, ultimately changes from what state to what state?

Workflow Routing

Workflows/FindEssence.md

Output Contract

Essence: Move people from point A to point B
Complete: (For passengers, in travel scenarios, on-demand, paid, safe, and comfortable) move people from point A to point B
Scenario: You stand at the company gate after work, wanting to go home.
Operation: You call a car, get in, and get off after arriving at your doorstep.
Change: You: Company gate -> Home doorstep
Pointing out the core: What you truly accomplished just now is "move people from point A to point B"; vehicle type, price, and comfort are just implementations and quality metrics.
Structural Formula: (X, S0) -> (X, S1)
Variables: X=Object undergoing change; S0=Starting state; S1=Completed state
Migration: File: Download directory -> Archive directory; object, direction, and completion test correspond item by item
Boundary: Only migrate "change of object's position"; do not migrate passenger identity, payment relationship, comfort, or transportation carrier

~/Documents/notes/{timestamp}--Essence-{Target}__is.org

read-only

Gotchas

• Don't confuse the complete definition with the essence. Subject, scenario, identity, boundaries, quality, speed, cost, risk, and implementation methods are usually qualifying conditions in parentheses.
• Don't end with a list of advantages. "Safe, comfortable, efficient" describes how well something is done, not what is ultimately done.
• Don't require the core to occupy a single category. Taxi, bus, and private car may share "move people from point A to point B"; this means they share the essence of purpose, not that the extraction failed.
• Don't stop at abstract nouns. "Service", "value", "connection", "experience", "efficiency" have no direction or completion state and cannot be used as the core.
• Don't write implementations into the core. Cars, Apps, algorithms, stores, contracts, and networks are just how things are done. If changing an implementation can still accomplish the same change, it should go into parentheses.
• Don't delete the object undergoing change. "From A to B" is too vague; "move people from point A to point B" preserves the target and direction.
• Don't distort for brevity. Minimalism is not a word-count competition. Stop when removing one more word would lose the object, starting point, end point, or direction of change.
• Don't write examples as spectator stories. Must let "you" perform specific actions, see

  A -> B

  , and point out which step is the core.
• Don't let the four modules overlap in responsibilities. Stripping explains qualifications, examples are for near-field understanding, structural migration is for far-field stress testing, and validation only forms a minimal closed loop.
• Don't use pseudo-mathematics to seem profound. Structural formulas are relationship signatures, not empirical laws; when

  (X, S0) -> (X, S1)

  is sufficient, do not add integrals, sums, or proportion symbols.
• Don't confuse similarity with isomorphism. Migration must align object, starting point, end point, direction, and completion test item by item, and clearly state "what to migrate only / what not to migrate".
• Don't let migration overshadow the core. Distant-domain cases are used to verify the structure; if it forces the core to change to another problem, go back to the original target and rewrite the structural formula.
• Don't ask unnecessary questions. Analyze directly when given a clear target; only ask once if the target itself is missing.
• Don't mix the three skills.

  ljg-is

  finds "A to B";

  ljg-think

  asks "why";

  ljg-structure

  finds "what relationship repeatedly generates results".

Examples

User: /ljg-is Taxi
Essence: Move people from point A to point B
Complete: (For passengers, in travel scenarios, on-demand, paid, safe, and comfortable) move people from point A to point B
Scenario: You stand at the company gate after work, aiming to go home.
Operation: You call a car, get in, travel, get off; then imagine replacing a luxury car with a regular car.
Change: You: Company gate -> Home doorstep
Pointing out the core: As long as the position change is completed, "move people from point A to point B" holds; changing the vehicle type alters the implementation, while changing comfort alters quality.
Structural Formula: (X, S0) -> (X, S1)
Variables: X=Object undergoing change; S0=Original position; S1=Target position
Migration: File: Download directory -> Archive directory; object, direction, and completion test remain consistent
Boundary: Only migrate "object moving from one position to another"; do not migrate payment, safety, comfort, or traffic rules

User: /ljg-is 强化学习
Essence: Let the consequences of past actions improve future action choices
Structural Formula: (A_past, C_past) -> A_next
Variables: A_past=Past action choices; C_past=Consequences of these actions; A_next=Future choices improved by experience
Migration: Team retrospective: (Plan_past, Result_past) -> Plan_next; feedback changes the next choice
Boundary: Only migrate "consequence feedback improves future choices"; do not migrate reward definition, Agent, environment, or optimization algorithm